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1 space experiments with particle accelerators
Computers: SEPACУниверсальный русско-английский словарь > space experiments with particle accelerators
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2 Hawthorne experiments
Gen Mgta series of studies undertaken at the Hawthorne plant of Western Electric in the United States from which Elton Mayo concluded that an approach emphasizing employee participation can improve productivity. The Hawthorne experiments began in 1924 as a study conducted by the National Research Council into the relationship between workplace lighting and employee efficiency, and was then extended to include wage incentives and rest periods. It was found that whatever variations were applied upward or downward, output rose, and this was termed the Hawthorne effect. The increased productivity was attributed to several causes, including small group size, earnings, the novelty of being part of an experiment, and the increased attention given to the employees being studied. The style of the supervisor, which was relaxed and friendly, in contrast to the then standard practice, was found to be particularly important. In a second group of employees, however, it was observed that, as the experiments progressed, output was restricted, and that whatever the incentive, the group showed a resistance to it. In 1929, and 1930, Elton Mayo visited Hawthorne. He linked supervisory style and levels of morale with productivity. High productivity resulted from an engaged supervisory style that encouraged participation. Low productivity resulted when a supervisor remained remote and retained a traditional supervisory role. The Hawthorne experiments established the importance of management style and interpersonal skills to organizational success. -
3 в холодной среде
Experiments with Earth's vegetation in cold climates have shown that the Wood effect disappears…Русско-английский словарь по космонавтике > в холодной среде
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4 земная растительность
Experiments with Earth's vegetation in cold climates have shown that…Русско-английский словарь по космонавтике > земная растительность
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5 как выяснилось на примере
Experiments with Earth's vegetation in cold climates have shown that the Wood effect disappears…Русско-английский словарь по космонавтике > как выяснилось на примере
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6 что является
Experiments with Earth's vegetation in cold climates have shown that the Wood effect disappears, this being a defence reaction to low temperature. -
7 эксперимент
experiment, test, trial• Более ранние эксперименты подтверждают, что... - More recent experiments confirm that...• Выло разработано много экспериментов для сбора информации о... - Many experiments are designed to supply information on...• В настоящее время проводятся эксперименты, чтобы исследовать... - Experiments are currently underway to investigate...• В последующих экспериментах стало возможным измерить... - In subsequent experiments, it was possible to measure...• В связи с этими исследованиями были проведены эксперименты, которые... - Following these studies, experiments were carried out in which...• Вместо этого эксперименты показывают, что.,. - Instead, experiments show that...• ` (применять и т. п.)... - In all such experiments it is necessary to...• Второй эксперимент отличается от первого в нескольких важных направлениях. - The second experiment differs from the first in several important ways.• Давайте рассмотрим гипотетический эксперимент, в котором... - Let us consider a hypothetical experiment in which...• Данная формула хорошо согласуется с экспериментом. - This formula is in good agreement with the experiment.• Данные эксперименты указывали, что... - These experiments indicated that...• Из результатов экспериментов Смит [1] заключил, что... - From the results of experiments, Smith [1] concluded that...• Изучая результаты этого и подобных экспериментов, мы обнаруживаем, что... - From this and similar experiments it is found that...• Недавние эксперименты показали, что... - Recent experiments have shown that...• Однако из экспериментов мы знаем, что бывают случаи, когда... - Experimentally, however, we know that there are cases when...• Основная трудность эксперимента проистекает из... - The main experimental difficulty arises from...• Подобные эксперименты были произведены Смитом [1]. - Similar experiments have been conducted by Smith [1].• Рассмотрим, например, эксперимент, в котором... - Consider, for example, an experiment in which...• С другой стороны, эксперименты показывают, что... - On the other hand, experiments show that...• Смит выполнил аналогичные эксперименты, в которых... - Smith has performed analogous experiments in which...• Такое согласие между теорией и экспериментом вполне удовлетворительно в свете... - The agreement between theory and experiment is quite good in view of...• Трудности этого эксперимента становятся ясными, когда осознаешь, что... - The experimental difficulties become apparent when one realizes that...• Тщательные эксперименты доказали, что... - Careful tests proved that...• Чтобы проиллюстрировать предыдущие утверждения, рассмотрим эксперимент, в котором... - То illustrate the preceding statements, let us consider an experiment in which...• Эксперимент подтверждает это, однако одновременно показывает, что... - Experiment confirms this but also shows that...• Эксперимент принес эффектное подтверждение... - The experiment provided dramatic confirmation of...• Эксперимент свидетельствует нам, что... - Experiment tells us that...• Эксперименты с полупроводниками показывают, что... - Experiments with semiconductors show that...• Эти эксперименты касались... - These experiments were concerned with...• Это было порождено экспериментами. - This is borne out by experiments.• Это мнение появилось после экспериментов, в которых... - This opinion was reached after experiments in which....• Это подтверждается лабораторными экспериментами. - This is supported by laboratory measurements.• Этот эксперимент был одной сплошной неудачей. - The experiment was a dismal failure.• Этот эксперимент мог бы показаться искусственным, однако он иллюстрирует... - This experiment may seem artificial, but it illustrates that... -
8 правя
на/превръщам в правя reduce/burn to ashesпосипвам си главата с правя do penance in sackcloth and ashes; put ashes on o.'s head, cover o.'s head with ashesправя на езика ти touch wood1. (изработвам, произвеждам) make(извършвам, изпълнявам, уреждам) do(сграда, мост и пр.) make. build(грешка) make, perpetrate(чай, кафе и пр.) makeправя гаргара gargleправя добро do goodправя впечатление на някого make/produce an impression on s.o., impress s.o.правя всичко възможно do o.'s utmost, do what one canправя избори hold electionsправя засечка misfire, hang fireправя изключение make/be an exceptionправя икономии make economies, economizeправя един кръг сп. get round one lapправя комплимент pay/make a complimentправя магарии get into mischiefима още много да се прави much yet remains to be doneправя опити make experiments, experimentправя посещение pay a visit (на to)правя преброяване на населението take a census. of the populationправя предложение make it proposal (на to), ( на събрание) table a motion, ( за женитба) propose to a ladyправя сватба get married; give a wedding party, make a wedding feastще правите ли сватба? are you going to give a wedding party/reception/feast?правя сензация make/cause a sensationправя снимка take a picture/snapshotправя стъпка take a step' правя състояние make money/a fortuneправя услуга на някого do s.o. a favour/service/kindness2. (постъпвам, действувам) do, actправи, както ти казвам- do as I tell youправи, каквото прави, все-радиото слуша he does nothing but listen to the radio, he keeps listening to the radioправя, каквото си ща have o.'s own way; obtain o.'s wayправя (с някого), каквото си ща turn/twist/wind (s.o.) round o.'s (little) finger; mould s.o. like waxдобре прави той, че he does well to (c inf.)зле правите, като you are wrong toправя същото do the same; follow suit3. (представям някого за някакъв) take (s.o.) forзащо ме правиш на дете? why do you treat me like a child?тази рокля я пвави по-дебела, отколкото е this dress makes her look fatter than she is; this dress is not slimming4. (превръщам в) turn (s.th.) into, make intoправя нощта на ден turn night into day, ( работя до късно) burn the midnight oilправяна пепел burn to ashes5. (при смятане) makeпет по пет правят двадесет и пет five times five make twenty five6. (ставам причина за, предизвиквам) cause, bring aboutград глад не прави hail will/does not cause hungerтози. шум ме прави да пощурея this noise drives me madкакво правите? how are you? how are you getting along?какво ще я правиш тази къща? (за какво ти е) what are you going to do with this house? what earthly good will this house be to you?не знам какво ще правя с тези... (не ми са нужни) I have no earthly use for..., I have no idea what to do with...правя дългове make/contract debtsправя някому компания keep s.o. companyтова ви прави чест it does you creditправя поведение stand on o.'s good behaviour, put o.'s best foot forwardправя подаръци give/make presentsправя скомина на някого set s.o.'s teeth on edgeправя-струвам contrive, leave no stone unturnedправя температура run a temperatureправя си застраховка take out an insuranceправя си зъбите have o.'s teeth fixed, have o.'s teeth attended toправя си илюзии cherish illusionsправяси косата на апарат have o.'s hair permed, have a permправя си костюм (н пр.) have a suit (etc.) madeправя си къща have a house builtправя си сметката безправя make/stage/engineer a coup* * *пра̀вя,гл., мин. св. деят. прич. пра̀вил 1. ( изработвам, произвеждам) make; ( извършвам, изпълнявам, уреждам) do; ( грешка) make, perpetrate; ( чай, кафе и пр.) make; има още много да се прави much yet remains to be done; \правя впечатление на някого make/produce an impression on s.o.; \правя всичко възможно do o.’s utmost, do what one can, do o.’s best, do all one can; \правя въпрос raise an issue, разг. make a fuss, kick up a fuss (за about); \правя добро do good; \правя една обиколка спорт. get round one lap; \правя изключение make/be an exception; \правя магарии get into mischief; \правя опити make experiments, experiment; \правя преброяване на населението take a census of the population; \правя сватба give a wedding party, make a wedding feast; \правя сензация make/cause a sensation; \правя снимка take a picture/snapshot; \правя сравнения/паралели/заключения draw comparisons/parallels/conclusions; \правя стъпка take a step; \правя състояние make money/a fortune;2. ( постъпвам, действам) do, act; зле правите като you are wrong to; прави, както ти казвам do as I tell you; \правя, каквото си ща have o.’s own way; obtain o.’s way; \правя (с някого), каквото си ща turn/twist/wind (s.o.) round o.’s (little) finger; mould s.o. like wax; \правя същото do the same; follow suit;3. ( представям някого за някакъв) take (s.o.) for; защо ме правиш на дете? why do you treat me like a child? тази рокля я прави по-дебела, отколкото е this dress makes her look fatter than she is;4. ( превръщам в) turn (s.th.) into, make into; \правя на пепел burn to ashes;\правя се ( преструвам се) pretend, feign; \правя се на беден pretend to be poor; talk poor; \правя се на безразличен wear an air of indifference; \правя се на Ибрям башия play possum; \правя се на луд ( смахнат) play the fool/goat/monkey; \правя се на невинен put on an innocent air/look; \правя се, че върша нещо make a feint of doing s.th.; \правя се, че знам let on, look knowing; \правя се, че не виждам wink, connive, look the other way, (не обръщам внимание на) turn a blind eye to, pretend not to see; give (s.th./s.o.) the go-by; ( пренебрегвам) cut (s.o.) dead, give (s.o.) the cold shoulder; • какво правите? how are you? how are you getting along? не знам какво ще \правя с тези … (не ми са нужни) I have no earthly use for …, I have no idea what to do with …; \правя бебе на get (a girl) in trouble, make (a woman) pregnant; put (a woman) in the family way; \правя мили очи fawn (upon), toady; \правя някому компания keep s.o. company; \правя поведение stand on o.’s good behaviour, put o.’s best foot forward; \правя си застраховка take out an insurance; \правя си зъбите have o.’s teeth fixed, have o.’s teeth attended to; \правя си костюм (и пр.) have a suit (etc.) made; \правя си сметката без кръчмаря reckon without o.’s host; \правя си устата drop a hint (that one would like s.th.); \правя-струвам contrive, leave no stone unturned; това ви прави чест it does you credit.* * *make (изработвам, произвеждам): This house is made of bricks. - Тази къща е направена от тухли., He made money abroad. - Той направи пари в чужбина., She правяs experiments with white mice. - Тя прави експерименти с бели мишки., One and one правяs two. - Едно и едно прави две., The news made her happy. - Новината я направи щастлива., She made herself a cup of coffee. - Тя си направи чаша кафе.; do (извършвам, изпълнявам): Would you правя me a favor? - Ще ми направиш ли една услуга?, What am I going to правя now? - Какво ще правя сега?, She правяes her hair. - Тя си прави косата., I have lots of work to правя. - Имам да правя много неща.; pay (посещение): He paid me a visit. - Той ми направи посещение.; perpetrate (грешка); vitiate (недействителен за договор, юр.); pretend (се): She правяs to be sleeping. - Тя се прави на заспала.; take: правя a step ahead - правя стъпка напред;* * *1. 'ПРАВЯ състояние make money/a fortune 2. (грешка) make, perpetrate 3. (извършвам, изпълнявам, уреждам) do 4. (изработвам, произвеждам) make 5. (обрат) turn, (radical) change 6. (постъпвам, действувам) do, act 7. (превръщам в) turn (s.th.) into, make into 8. (представям някого за някакъв) take (s.o.) for 9. (при смятане) make 10. (сграда, мост и пр.) make. build 11. (ставам причина за, предизвиквам) cause, bring about 12. -ПРАВЯ си сметката без 13. ПРАВЯ (с някого), каквото си ща turn/ twist/wind (s.o.) round o.'s (little) finger;mould s.o. like wax 14. ПРАВЯ make/stage/engineer a coup 15. ПРАВЯ бебе на get (a girl) ;n trouble, make (a woman) pregnant;put (a woman) in the family way 16. ПРАВЯ впечатление на някого make/produce an impression on s.o., impress s.o. 17. ПРАВЯ всичко възможно do o.'s utmost, do what one can 18. ПРАВЯ въпрос raise an issue, разг. make a fuss, kick up a fuss (за about) 19. ПРАВЯ гаргара gargle 20. ПРАВЯ добро do good 21. ПРАВЯ дългове make/contract debts 22. ПРАВЯ един кръг сп. get round one lap 23. ПРАВЯ засечка misfire, hang fire 24. ПРАВЯ избори hold elections 25. ПРАВЯ изключение make/be an exception 26. ПРАВЯ икономии make economies, economize 27. ПРАВЯ комплимент pay/make a compliment 28. ПРАВЯ магарии get into mischief 29. ПРАВЯ мили очи fawn (upon), toady 30. ПРАВЯ на езика ти touch wood. 31. ПРАВЯ нощта на ден turn night into day, (работя до късно) burn the midnight oil 32. ПРАВЯ някому компания keep s.o. company 33. ПРАВЯ опити make experiments, experiment 34. ПРАВЯ поведение stand on o.'s good behaviour, put o.'s best foot forward 35. ПРАВЯ подаръци give/make presents 36. ПРАВЯ посещение pay a visit (на to) 37. ПРАВЯ преброяване на населението take a census. of the population 38. ПРАВЯ предложение make it proposal (на to), (на събрание) table a motion, (за женитба) propose to a lady: ПРАВЯ сватба get married;give a wedding party, make a wedding feast 39. ПРАВЯ сензация make/cause a sensation 40. ПРАВЯ си застраховка take out an insurance 41. ПРАВЯ си зъбите have o.'s teeth fixed, have o.'s teeth attended to 42. ПРАВЯ си илюзии cherish illusions 43. ПРАВЯ си костюм (н пр.) have a suit (etc.) made 44. ПРАВЯ си къща have a house built 45. ПРАВЯ скомина на някого set s.o.'s teeth on edge 46. ПРАВЯ снимка take a picture/snapshot 47. ПРАВЯ стъпка take a step 48. ПРАВЯ същото do the same;follow suit 49. ПРАВЯ температура run a temperature 50. ПРАВЯ услуга на някого do s.o. a favour/service/kindness 51. ПРАВЯ, каквото си ща have o.'s own way;obtain o.'s way 52. ПРАВЯ-струвам contrive, leave no stone unturned 53. ПРАВЯна пепел burn to ashes 54. ПРАВЯси косата на апарат have o.'s hair permed, have a perm 55. град глад не прави hail will/does not cause hunger 56. добре прави той, че he does well to (c inf.) 57. защо ме правиш на дете? why do you treat me like a child? 58. зле правите, като уоu are wrong to 59. има още много да се прави much yet remains to be done 60. какво правите? how are you?how are you getting along? 61. какво ще я правиш тази къща? (за какво ти е) what are you going to do with this house?what earthly good will this house be to you? 62. на/превръщам в ПРАВЯ reduce/burn to ashes 63. не знам какво ще правя с тези... (не ми са нужни) I have no earthly use for..., I have no idea what to do with... 64. пет по пет правят двадесет и пет five times five make twenty five 65. посипвам си главата с ПРАВЯ do penance in sackcloth and ashes;put ashes on o.'s head, cover o.'s head with ashes 66. прави, каквото прави, все-радиото слуша he does nothing but listen to the radio, he keeps listening to the radio 67. прави, както ти казвам-do as I tell you 68. ставам на ПРАВЯ be reduced to ashes 69. тази рокля я пвави по-дебела, отколкото е this dress makes her look fatter than she is;this dress is not slimming 70. това ви прави чест it does you credit 71. този. шум ме прави да пощурея this noise drives me mad 72. тури му ПРАВЯ let bygones be bygones, forget it 73. чaй, кафе и пр.) make 74. ще правите ли сватба? are you going to give a wedding party/reception/feast? -
9 Lawes, Sir John Bennet
SUBJECT AREA: Agricultural and food technology[br]b. 28 December 1814 Rothamsted, Hertfordshire, Englandd. 31 August 1900 Rothamsted, Hertfordshire, England[br]English scientific agriculturalist.[br]Lawes's education at Eton and Oxford did little to inform his early taste for chemistry, which he developed largely on his own. By the age of 20 he had fitted up the best bedroom in his house as a fully equipped chemical laboratory. His first interest was in the making of drugs; it was said that he knew the Pharmacopoeia, by heart. He did, however, receive some instruction from Anthony Todd Thomson of University College, London. His father having died in 1822, Lawes entered into possession of the Rothamsted estate when he came of age in 1834. He began experiments with plants with uses as drugs, but following an observation by a neighbouring farmer of the effect of bones on the growth of certain crops Lawes turned to experiments with bones dissolved in sulphuric acid on his turnip crop. The results were so promising that he took out a patent in 1842 for converting mineral and fossil phosphates into a powerful manure by the action of sulphuric acid. The manufacture of these superphosphates became a major industry of tremendous benefit to agriculture. Lawes himself set up a factory at Deptford in 1842 and a larger one in 1857 at Barking Creek, both near London. The profits from these and other chemical manufacturing concerns earned Lawes profits which funded his experimental work at Rothamsted. In 1843, Lawes set up the world's first agricultural experiment station. Later in the same year he was joined by Joseph Henry Gilbert, and together they carried out a considerable number of experiments of great benefit to agriculture, many of the results of which were published in the leading scientific journals of the day, including the Philosophical Transactions of the Royal Society. In all, 132 papers were published, most of them jointly with Gilbert. A main theme of the work on plants was the effect of various chemical fertilizers on the growth of different crops, compared with the effects of farm manure and of no treatment at all. On animal rearing, they studied particularly the economical feeding of animals.The work at Rothamsted soon brought Lawes into prominence; he joined the Royal Agricultural Society in 1846 and became a member of its governing body two years later, a position he retained for over fifty years. Numerous distinctions followed and Rothamsted became a place of pilgrimage for people from many parts of the world who were concerned with the application of science to agriculture. Rothamsted's jubilee in 1893 was marked by a public commemoration headed by the Prince of Wales.[br]Principal Honours and DistinctionsBaronet 1882. FRS 1854. Royal Society Royal Medal (jointly with Gilbert) 1867.Further ReadingMemoir with portrait published in J. Roy. Agric. Soc. Memoranda of the origin, plan and results of the field and other experiments at Rothamsted, issued annually by the Lawes Agricultural Trust Committee, with a list of Lawes's scientific papers.LRD -
10 Smith, Oberlin
[br]b. 22 March 1840 Cincinnati, Ohio, USAd. 18 July 1926[br]American mechanical engineer, pioneer in experiments with magnetic recording.[br]Of English descent, Smith embarked on an education in mechanical engineering, graduating from West Jersey Academy, Bridgeton, New Jersey, in 1859. In 1863 he established a machine shop in Bridgeton, New Jersey, that became the Ferracute Machine Company in 1877, eventually specializing in the manufacture of presses for metalworking. He seems to have subscribed to design principles considered modern even in the 1990s, "always giving attention to the development of artistic form in combination with simplicity, and with massive strength where required" (bibliographic reference below). He was successful in his business, and developed and patented a large number of mechanical constructions.Inspired by the advent of the phonograph of Edison, in 1878 Smith obtained the tin-foil mechanical phonograph, analysed its shortcomings and performed some experiments in magnetic recording. He filed a caveat in the US Patent Office in order to be protected while he "reduced the invention to practice". However, he did not follow this trail. When there was renewed interest in practical sound recording and reproduction in 1888 (the constructions of Berliner and Bell \& Tainter), Smith published an account of his experiments in the journal Electrical World. In a corrective letter three weeks later it is clear that he was aware of the physical requirements for the interaction between magnetic coil and magnetic medium, but his publications also indicate that he did not as such obtain reproduction of recorded sound.Smith did not try to develop magnetic recording, but he felt it imperative that he be given credit for conceiving the idea of it. When accounts of Valdemar Poulsen's work were published in 1900, Smith attempted to prove some rights in the invention in the US Patent Office, but to no avail.He was a highly respected member of both his community and engineering societies, and in later life became interested in the anti-slavery cause that had also been close to the heart of his parents, as well as in the YMCA movement and in women's suffrage.[br]BibliographyApart from numerous technical papers, he wrote the book Press Working of Metals, 1896. His accounts on the magnetic recording experiments were "Some possible forms of phonograph", Electrical World (8 September 1888): 161 ff, and "Letter to the Editor", Electrical World (29 September 1888): 179.Further ReadingF.K.Engel, 1990, Documents on the Invention of Magnetic Recording in 1878, New York: Audio Engineering Society, Reprint no. 2,914 (G2) (a good overview of the material collected by the Oberlin Smith Society, Bridgeton, New Jersey, in particular as regards the recording experiments; it is here that it is doubted that Valdemar Poulsen developed his ideas independently).GB-N -
11 Talbot, William Henry Fox
SUBJECT AREA: Photography, film and optics[br]b. 11 February 1800 Melbury, Englandd. 17 September 1877 Lacock, Wiltshire, England[br]English scientist, inventor of negative—positive photography and practicable photo engraving.[br]Educated at Harrow, where he first showed an interest in science, and at Cambridge, Talbot was an outstanding scholar and a formidable mathematician. He published over fifty scientific papers and took out twelve English patents. His interests outside the field of science were also wide and included Assyriology, etymology and the classics. He was briefly a Member of Parliament, but did not pursue a parliamentary career.Talbot's invention of photography arose out of his frustrating attempts to produce acceptable pencil sketches using popular artist's aids, the camera discura and camera lucida. From his experiments with the former he conceived the idea of placing on the screen a paper coated with silver salts so that the image would be captured chemically. During the spring of 1834 he made outline images of subjects such as leaves and flowers by placing them on sheets of sensitized paper and exposing them to sunlight. No camera was involved and the first images produced using an optical system were made with a solar microscope. It was only when he had devised a more sensitive paper that Talbot was able to make camera pictures; the earliest surviving camera negative dates from August 1835. From the beginning, Talbot noticed that the lights and shades of his images were reversed. During 1834 or 1835 he discovered that by placing this reversed image on another sheet of sensitized paper and again exposing it to sunlight, a picture was produced with lights and shades in the correct disposition. Talbot had discovered the basis of modern photography, the photographic negative, from which could be produced an unlimited number of positives. He did little further work until the announcement of Daguerre's process in 1839 prompted him to publish an account of his negative-positive process. Aware that his photogenic drawing process had many imperfections, Talbot plunged into further experiments and in September 1840, using a mixture incorporating a solution of gallic acid, discovered an invisible latent image that could be made visible by development. This improved calotype process dramatically shortened exposure times and allowed Talbot to take portraits. In 1841 he patented the process, an exercise that was later to cause controversy, and between 1844 and 1846 produced The Pencil of Nature, the world's first commercial photographically illustrated book.Concerned that some of his photographs were prone to fading, Talbot later began experiments to combine photography with printing and engraving. Using bichromated gelatine, he devised the first practicable method of photo engraving, which was patented as Photoglyphic engraving in October 1852. He later went on to use screens of gauze, muslin and finely powdered gum to break up the image into lines and dots, thus anticipating modern photomechanical processes.Talbot was described by contemporaries as the "Father of Photography" primarily in recognition of his discovery of the negative-positive process, but he also produced the first photomicrographs, took the first high-speed photographs with the aid of a spark from a Leyden jar, and is credited with proposing infra-red photography. He was a shy man and his misguided attempts to enforce his calotype patent made him many enemies. It was perhaps for this reason that he never received the formal recognition from the British nation that his family felt he deserved.[br]Principal Honours and DistinctionsFRS March 1831. Royal Society Rumford Medal 1842. Grand Médaille d'Honneur, L'Exposition Universelle, Paris, 1855. Honorary Doctorate of Laws, Edinburgh University, 1863.Bibliography1839, "Some account of the art of photographic drawing", Royal Society Proceedings 4:120–1; Phil. Mag., XIV, 1839, pp. 19–21.8 February 1841, British patent no. 8842 (calotype process).1844–6, The Pencil of Nature, 6 parts, London (Talbot'a account of his invention can be found in the introduction; there is a facsimile edn, with an intro. by Beamont Newhall, New York, 1968.Further ReadingH.J.P.Arnold, 1977, William Henry Fox Talbot, London.D.B.Thomas, 1964, The First Negatives, London (a lucid concise account of Talbot's photograph work).J.Ward and S.Stevenson, 1986, Printed Light, Edinburgh (an essay on Talbot's invention and its reception).H.Gernsheim and A.Gernsheim, 1977, The History of Photography, London (a wider picture of Talbot, based primarily on secondary sources).JWBiographical history of technology > Talbot, William Henry Fox
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12 Charles, Jacques Alexandre César
SUBJECT AREA: Aerospace[br]b. 12 November 1746 Beaugency, Franced. 7 April 1823 Paris, France[br]French physicist who developed the first hydrogen balloon, in 1783.[br]In 1783, following the early experiments with small hot-air balloons by the Montgolfier brothers, there was a growing interest in the prospect of a balloon flight with people on board. The Paris Académie des Sciences encouraged one of their physicists, Charles, to carry out experiments and produce a balloon. Charles enlisted the assistance of two brothers, Anne-Jean and Marie-Noël Robert, who were practical craftsmen with experience of coating silk fabric with rubber to make it impermeable to gases. Charles decided to use the recently discovered lighter-than-air gas, hydrogen, for his experiments rather than hot air. After making several unmanned balloons, he had a manned balloon ready for testing on 1 December 1783. Despite the fact that a Montgolfier balloon had already flown with two passengers, there was enormous public interest in the flight: one estimate suggested that 400,000 people turned out to watch. Charles and Marie-Noël Robert ascended from the gardens of the Tuileries and landed after two hours, having covered 45 km (28 miles). Technically the "Charlière" was far superior to the "Montgolfière" and was therefore used by most subsequent balloonists until the introduction of the modern hot-air balloon by the American Paul E. Yost in the 1960s. Following Meusnier's proposals for a dirigible (steerable) balloon, put forward during 1783–5, Charles and the Robert brothers built an elongated balloon incorporating Meusnier's ballonnet principle. It had a rudder but the method of propulsion, by opening and closing parasols used as paddles, was totally ineffective.[br]Principal Honours and DistinctionsMember of the Académie des Sciences 1795.Further ReadingL.T.C.Rolt, 1966, The Aeronauts, London. C.Dollfus, 1961, Balloons, trans. C.Mason, London. J.B.F.Fourier, 1825, Notice.JDSBiographical history of technology > Charles, Jacques Alexandre César
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13 показать
(= показывать) show, register, read, exhibit, reveal, depict, display, illustrate, indicate• Анализ этих уравнений показывает, что... - Inspection of these equations shows that...• Более совершенным рассуждением можно показать, что... - By a more refined argument it can be shown that...• Более того, данное обсуждение показывает, что... - The discussion shows, moreover, that...• Более точное вычисление показывает, что... - A more exact calculation shows that...• Быстро покажем, что... - It will be shown in a moment that...• В главе 2 мы вернемся к этому вопросу и попытаемся показать, что... - In Chapter 2 we shall return to this question and try to show that...• В предыдущем параграфе мы уже показали, как исследовать... - In the preceding section we have shown how to investigate...• Важно, что исследование также показывает, что... - Importantly, the study also shows that...• Нам остается лишь показать, что... - All that remains is to show that...• Вычисления показали, что... - Computations have shown that...• Далее будет показано, что... - It will be shown in the sequel that...• Далее можно показать, что... - It can further be shown that...• Далее, легко показать, что... - It is easy to show, furthermore, that...• Далее, мы показываем, что существуют функции, нарушающие это неравенство при к > 2... - Next, we show that there are functions which violate this inequality for к > 2.• Дальнейшее исследование, однако, показало, что... - Further investigation, however, has shown that...• Дальнейшее применение соотношения (1) показывает, что... - Further application of (1) shows that...• Данная формулировка показывает сразу несколько аспектов. - The formulation reveals several things.• Данные примеры должны показать, что... - These examples should make it clear that...• Данный подход показывает, что... - The present approach shows that...• Данный результат следует немедленно, если мы можем показать, что... - The result will follow immediately if we can show that...• Действительно, в этом случае мы могли бы показать, что... - Indeed, in this case, we may show that...• Довольно громоздкое вычисление показывает, что... - A somewhat lengthy computation shows that...• Еще более удивительным является пример, найденный Смитом [11], который показывает, что... - Even more startling is an example due to Smith [11], which shows that...• Еще раз, это показывает зависимость... - Again, this demonstrates the dependence of...• Здесь мы можем только показать, что... - We can show here only that...• Изучение... показывает, что... - Studies of... indicate that...• Используя определения F и G, легко показать, что... - It is a simple matter, using the definitions of F and G, to show that...• Используя эти соотношения, мы легко можем показать по индукции, что... - From these relations we can easily show by induction that...• Исследование уравнения (4) показывает, что... - An examination of (4) shows that...• Исследования показали важность... - The studies demonstrated the importance of...• Видимо, все это показывает, что... - All this seems to show that...• Как легко показать, используя..., этим можно полностью пренебречь. - It is utterly negligible, as we can easily show by...• Как показывает следующий пример, это не обязательно выполняется. - This is not necessarily the case, as the following example illustrates.• Как приложение данного результата, мы покажем, что... - As an application of this result, we show that...• Количественный анализ этих результатов показывает, что... - A quantitative analysis of these results shows that...• Легко показать, что... - It is easily shown that...• Легкое изменение приведенного выше рассуждения показывает, что... - A slight modification of the above reasoning shows that...• Метод анализа, намеченный в предыдущем абзаце, показывает... - The method of analysis outlined in the last paragraph shows...• Многие годы экспериментов показали, что... - Many years of experimentation have shown that...• Можно показать, что в целом это заключение является справедливым. - It can be shown that this conclusion is generally valid.• Можно показать, что они являются как достаточными, так и необходимыми. - It may be shown that they are sufficient as well as necessary.• Можно показать, что это эквивалентно условию... - This can be shown to be equivalent to the condition that...• Мы должны показать, что... - We have to show that...• Мы можем показать это на простом примере. - We can demonstrate this with a simple example.• Мы оставляем для самостоятельного решения задачу показать, что... - We leave it as a problem to show that...• Мы покажем теперь, что это не справедливо. - We shall now show that this is not the case.• Мы хотим явно показать, что... - We wish to show explicitly that...• На самом деле мы лишь показали, что... - We have in fact only shown that...• На самом деле мы можем показать, что... - We can show, in fact, that...• На самом деле, его исследование, похоже, показывает, что... - Actually his investigation seemed to show that...• Нам остается показать, что... - We need only to show that...; It remains for us to show that...• Намеченные выше вычисления показывают, что... - The calculations outlined above show that...• Например, мы покажем, что... - We shall show, for example, that...• Например, не слишком трудно показать, что... - For example, it is not too difficult to show that...• Например, экспериментально было показано, что... - For example, it has been shown experimentally that...• Наш простой пример показывает, что... - Our simple example demonstrates that...• Наши цифры показывают, что... - Our figures show that...• Небольшое изменение этого доказательства показывает, что... - A minor modification of the proof shows that...• Небольшое размышление показывает, что... - A moment's reflection will indicate that...• Недавние эксперименты показали, что... - Recent experiments have shown that...• Недавняя работа показала, что... - Recent work has shown that...• Недолгое размышление покажет, что... - A moment's thought will show that...• Несколько иное рассуждение показывает, что... - A slightly different argument shows that...• Общие наблюдения показывают... - It is a matter of common observation that...• Один тип... показан на рис. 2. - One type of... is shown in Figure 2.• Однако, мы хотим показать, что... - We wish to show, however, that...• Однако мы уже показали, что... - But we have already shown that...• Однако следующая теорема показывает, что... - The next theorem shows, however, that...• Он показал существование глобального по времени решения. - Не showed existence of a global-in-time weak solution.• Описанные здесь исследования показывают, что... - The studies described here show that...• Исторический опыт показывает, что... - Historical experience shows that...• Остается показать, что... - It remains to be shown that...• Оценка показывает, что... - It is estimated that...• Подобное же рассуждение показывает нам... - A similar argument will show that...• Подобные вычисления показывают, что... - Similar computations reveal that...• Подобным образом можно показать, что... - In like manner it can be shown that...• Подробный вывод показал бы, что... - A detailed derivation would show that...• Подстановка этой величины в уравнение (1) показывает, что... - Insertion of this value into equation (1) shows that...• Полная теория показывает, что... - Detailed theory shows that...• Помимо всего, нам необходимо показать, что... - Above all, we need to show that...• Помимо прочих следствий, данный результат показывает, что... - Among other things, this result shows that...• Последнее разложение показывает, что... - The latter expansion shows that...• Это может быть трудно показать на практике. - In practice this may be difficult to demonstrate.• Предварительные результаты показывают, что... - The preliminary results suggest that...• Пренебрегая этими эффектами, легко показать, что... - Neglecting these effects it is easy to show that...• Приведенный выше пример 2 показывает, что... - Example 2 above shows that...• Придерживаясь тех же обозначений, что и в первом параграфе, мы покажем, что... - With the same notation as in Section 1, we shall show that...• Применение данного метода показывает... - An application of this process shows...• Продолжая действовать так же, как в параграфе 1, мы можем показать, что... - Proceeding as in Section 1, we may show that...• Ранее мы показывали, что... - Earlier we showed that...• Рассуждение, приведенное в конце последней главы, показывает, что... - The argument at the end of the last chapter shows that...• Рассуждения Гильберта относительно этого уравнения показывают, что... - Hilbert's discussion of this equation shows that...• Реальные вычисления, однако, показывают, что... - Actual computations show, however, that...• Результат показан ниже. - The result is recorded below.• С другой стороны, эксперименты показывают, что... - On the other hand, experiments show that...• Следующая серия примеров (= иллюстраций) показывает... - The following series of illustrations shows...• Следующая теорема позволяет нам показать, что... - The following theorem enables us to show that...• Следующие задачи помогут показать, что важность... - The following problems will help show that importance of...• Следующие примеры покажут важность данного определения. - Examples will bring out the significance of this definition.• Следующий пример показывает, что... - The following example shows that...• Следующим шагом мы покажем, что... - Next it will be shown that...• Совершенно аналогичным образом можно показать, что... - It can be shown by an exactly similar process that...• Сравнение с точным результатом (2) показывает, что... - A comparison with the exact result (2) shows that...• Ссылка на уравнение (6) показывает, что... - Reference to equation (6) shows that...• Стандартные вычисления показывают, что... - A routine calculation shows that...• Таблицы данных показывают, что... - The tables show that...• Теоретические соображения показывают, что... - Theoretical considerations show that...• Теперь мы покажем, что допустимо (предполагать и т. п.)... - We shall now show that it is permissible to...• Термометр показывает 20 градусов ниже нуля. - The thermometer shows/reads 20 degrees below zero.• Типичный... показан на рис. 2. - A typical... is shown in Figure 2.• То же самое рассуждение показывает, что... - The same reasoning shows that...• То же самое рассуждение четко показывает, что... - The same reasoning evidently shows that...• То же самое рассуждение, что и выше, показывает, что... - The same argument as above shows that...• То, что мы показали, это... - What we have shown is that...• Только что проделанные вычисления показывают нам, что... - The result just calculated shows us that...• Рис. 2 показывает результаты, полученные... - Fig. 2 shows results obtained for Equation (2.8).• Цель заключается в том, чтобы показать, что... - The aim is to show that...• Чтобы доказать теорему, достаточно показать, что... - То prove the theorem it is sufficient to show that...• Чтобы завершить доказательство, нам остается показать, что... - То complete the proof, we need to demonstrate that...• Чтобы показать, что обратное несправедливо, мы должны... - То show that the converse is false, we must...• Чтобы показать, что это невозможно, давайте... - То show that this is not possible, let...• Чтобы это доказать, нам остается лишь показать, что... - То prove this we need only show that...• Эксперимент подтверждает это, однако также(= одновременно) показывает, что... - Experiment confirms this but also shows that...• Эксперимент показывает, что... - Experiment shows that...; Experiment tells us that...• Эксперименты с полупроводниками показывают, что... - Experiments with semiconductors show that...• Эти и многие другие примеры показывают, что... - These and many other examples show that...• Эти равенства позволяют нам показать, что... - These identities enable us to show that...• Эти рассуждения показывают нам, что... - These considerations show us that...• Эти результаты ясно показывают, что... - These results clearly show that...• Это доказательство легко переделывается для того, чтобы показать, что... - The proof is easily adapted to show that...• Это могло бы быть легко показано при использовании условия... - This may be shown readily by employing the condition that...• Это можно показать двумя методами. - This can be seen in two ways.• Это показывает (одно) важное ограничение (чего-л). - This demonstrates an important limitation of...• Это показывает еще раз, что... - This shows once more that...• Это показывает, что невозможно... - This shows that it is impossible to...• Это простое соотношение немедленно показывает, что... - This simple relation shows immediately that...• Это соотношение также показывает, что... - This relation also shows that...• Это ясно показано на рис. 1, которая представляет результаты (чего-л). - This is clearly demonstrated in Figure 1 which shows the results of...• Этот пример показывает, что может быть необходимым... - This example shows that it may be necessary to...• Этот рисунок четко показывает принципиальные различия между... - This figure clearly illustrates the basic differences between...• Этот эффект будет обсуждаться в главе 2, где будет показано, что... - This effect will be discussed in Chapter 2, where it will be shown that... -
14 Parsons, Sir Charles Algernon
[br]b. 13 June 1854 London, Englandd. 11 February 1931 on board Duchess of Richmond, Kingston, Jamaica[br]English eingineer, inventor of the steam turbine and developer of the high-speed electric generator.[br]The youngest son of the Earl of Rosse, he came from a family well known in scientific circles, the six boys growing up in an intellectual atmosphere at Birr Castle, the ancestral home in Ireland, where a forge and large workshop were available to them. Charles, like his brothers, did not go to school but was educated by private tutors of the character of Sir Robert Ball, this type of education being interspersed with overseas holiday trips to France, Holland, Belgium and Spain in the family yacht. In 1871, at the age of 17, he went to Trinity College, Dublin, and after two years he went on to St John's College, Cambridge. This was before the Engineering School had opened, and Parsons studied mechanics and mathematics.In 1877 he was apprenticed to W.G.Armstrong \& Co. of Elswick, where he stayed for four years, developing an epicycloidal engine that he had designed while at Cambridge. He then moved to Kitson \& Co. of Leeds, where he went half shares in a small experimental shop working on rocket propulsion for torpedoes.In 1887 he married Katherine Bethell, who contracted rheumatic fever from early-morning outdoor vigils with her husband to watch his torpedo experiments while on their honeymoon! He then moved to a partnership in Clarke, Chapman \& Co. at Gateshead. There he joined the electrical department, initially working on the development of a small, steam-driven marine lighting set. This involved the development of either a low-speed dynamo, for direct coupling to a reciprocating engine, or a high-speed engine, and it was this requirement that started Parsons on the track of the steam turbine. This entailed many problems such as the running of shafts at speeds of up to 40,000 rpm and the design of a DC generator for 18,000 rpm. He took out patents for both the turbine and the generator on 23 April 1884. In 1888 he dissolved his partnership with Clarke, Chapman \& Co. to set up his own firm in Newcastle, leaving his patents with the company's owners. This denied him the use of the axial-flow turbine, so Parsons then designed a radial-flow layout; he later bought back his patents from Clarke, Chapman \& Co. His original patent had included the use of the steam turbine as a means of marine propulsion, and Parsons now set about realizing this possibility. He experimented with 2 ft (61 cm) and 6 ft (183 cm) long models, towed with a fishing line or, later, driven by a twisted rubber cord, through a single-reduction set of spiral gearing.The first trials of the Turbinia took place in 1894 but were disappointing due to cavitation, a little-understood phenomenon at the time. He used an axial-flow turbine of 2,000 shp running at 2,000 rpm. His work resulted in a far greater understanding of the phenomenon of cavitation than had hitherto existed. Land turbines of up to 350 kW (470 hp) had meanwhile been built. Experiments with the Turbinia culminated in a demonstration which took place at the great Naval Review of 1897 at Spithead, held to celebrate Queen Victoria's Diamond Jubilee. Here, the little Turbinia darted in and out of the lines of heavy warships and destroyers, attaining the unheard of speed of 34.5 knots. The following year the Admiralty placed their first order for a turbine-driven ship, and passenger vessels started operation soon after, the first in 1901. By 1906 the Admiralty had moved over to use turbines exclusively. These early turbines had almost all been direct-coupled to the ship's propeller shaft. For optimum performance of both turbine and propeller, Parsons realized that some form of reduction gearing was necessary, which would have to be extremely accurate because of the speeds involved. Parsons's Creep Mechanism of 1912 ensured that any errors in the master wheel would be distributed evenly around the wheel being cut.Parsons was also involved in optical work and had a controlling interest in the firm of Ross Ltd of London and, later, in Sir Howard Grubb \& Sons. He he was an enlightened employer, originating share schemes and other benefits for his employees.[br]Principal Honours and DistinctionsKnighted. Order of Merit 1927.Further ReadingA.T.Bowden, 1966, "Charles Parsons: Purveyor of power", in E.G.Semler (ed.), The Great Masters. Engineering Heritage, Vol. II, London: Institution of Mechanical Engineers/Heinemann.IMcNBiographical history of technology > Parsons, Sir Charles Algernon
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15 Seguin, Marc
[br]b. 20 April 1786 Annonay, Ardèche, Franced. 24 February 1875 Annonay, Ardèche, France[br]French engineer, inventor of multi-tubular firetube boiler.[br]Seguin trained under Joseph Montgolfier, one of the inventors of the hot-air balloon, and became a pioneer of suspension bridges. In 1825 he was involved in an attempt to introduce steam navigation to the River Rhône using a tug fitted with a winding drum to wind itself upstream along a cable attached to a point on the bank, with a separate boat to transfer the cable from point to point. The attempt proved unsuccessful and was short-lived, but in 1825 Seguin had decided also to seek a government concession for a railway from Saint-Etienne to Lyons as a feeder of traffic to the river. He inspected the Stockton \& Darlington Railway and met George Stephenson; the concession was granted in 1826 to Seguin Frères \& Ed. Biot and two steam locomotives were built to their order by Robert Stephenson \& Co. The locomotives were shipped to France in the spring of 1828 for evaluation prior to construction of others there; each had two vertical cylinders, one each side between front and rear wheels, and a boiler with a single large-diameter furnace tube, with a watertube grate. Meanwhile, in 1827 Seguin, who was still attempting to produce a steamboat powerful enough to navigate the fast-flowing Rhône, had conceived the idea of increasing the heating surface of a boiler by causing the hot gases from combustion to pass through a series of tubes immersed in the water. He was soon considering application of this type of boiler to a locomotive. He applied for a patent for a multi-tubular boiler on 12 December 1827 and carried out numerous experiments with various means of producing a forced draught to overcome the perceived obstruction caused by the small tubes. By May 1829 the steam-navigation venture had collapsed, but Seguin had a locomotive under construction in the workshops of the Lyons-Sain t- Etienne Railway: he retained the cylinder layout of its Stephenson locomotives, but incorporated a boiler of his own design. The fire was beneath the barrel, surrounded by a water-jacket: a single large flue ran towards the front of the boiler, whence hot gases returned via many small tubes through the boiler barrel to a chimney above the firedoor. Draught was provided by axle-driven fans on the tender.Seguin was not aware of the contemporary construction of Rocket, with a multi-tubular boiler, by Robert Stephenson; Rocket had its first trial run on 5 September 1829, but the precise date on which Seguin's locomotive first ran appears to be unknown, although by 20 October many experiments had been carried out upon it. Seguin's concept of a multi-tubular locomotive boiler therefore considerably antedated that of Henry Booth, and his first locomotive was completed about the same date as Rocket. It was from Rocket's boiler, however, rather than from that of Seguin's locomotive, that the conventional locomotive boiler was descended.[br]BibliographyFebruary 1828, French patent no. 3,744 (multi-tubular boiler).1839, De l'Influence des chemins de fer et de l'art de les tracer et de les construire, Paris.Further ReadingF.Achard and L.Seguin, 1928, "Marc Seguin and the invention of the tubular boiler", Transactions of the Newcomen Society 7 (traces the chronology of Seguin's boilers).——1928, "British railways of 1825 as seen by Marc Seguin", Transactions of the Newcomen Society 7.J.B.Snell, 1964, Early Railways, London: Weidenfeld \& Nicolson.J.-M.Combe and B.Escudié, 1991, Vapeurs sur le Rhône, Lyons: Presses Universitaires de Lyon.PJGR -
16 Wenham, Francis Herbert
SUBJECT AREA: Aerospace[br]b. 1824 London, Englandd. 11 August 1908 Folkestone, England[br]English engineer, inventor and pioneer aerodynamicist who built the first wind tunnel.[br]Wenham trained as a marine engineer and later specialized in screw propellers and high-pressure engines. He had many interests. He took his steamboat to the Nile and assisted the photographer F.Frith to photograph Egyptian tombs by devising a series of mirrors to deflect sunlight into the dark recesses. He experimented with gas engines and produced a hot-air engine. Wenham was a leading, if controversial, figure in the Microscopical Society and a member of the Royal Photographic Society; he developed an enlarger.Wenham was interested in both mechanical and lighter-than-air flight. One of his friends was James Glaisher, a well-known balloonist who made many ascents to gather scientific information. When the (Royal) Aeronautical Society of Great Britain was founded in 1866, the Rules were drawn up by Wenham, Glaisher and the Honorary Secretary, F.W.Brearey. At the first meeting of the Society, on 27 June 1866, "On aerial locomotion and the laws by which heavy bodies impelled through the air are sustained" was read by Wenham. In his paper Wenham described his experiments with a whirling arm (used earlier by Cayley) to measure lift and drag on flat surfaces inclined at various angles of incidence. His studies of birds' wings and, in particular, their wing loading, showed that they derived most of their lift from the front portion, hence a long, thin wing was better than a short, wide one. He published illustrations of his glider designs covering his experiments of c. 1858–9. One of these had five slender wings one above the other, an idea later developed by Horatio Phillips. Wenham had some success with a model, but no real success with his full-size gliders.In 1871, Wenham and John Browning constructed the first wind tunnel designed for aeronautical research. It utilized a fan driven by a steam engine to propel the air and had a working section of 18 in. (116 cm). Wenham continued to play an important role in aeronautical matters for many years, including a lengthy exchange of ideas with Octave Chanute from 1892 onwards.[br]Principal Honours and DistinctionsHonorary Member of the (Royal) Aeronautical Society.BibliographyWenham published many reports and papers. These are listed, together with a reprint of his paper "Aerial locomotion", in the Journal of the Royal Aeronautical Society (August 1958).Further ReadingTwo papers by J.Laurence Pritchard, 1957, "The dawn of aerodynamics" Journal of the Royal Aeronautical Society (March); 1958, "Francis Herbert Wenham", Journal of the Royal Aeronautical Society (August) (both papers describe Wenham and his work).J.E.Hodgson, 1924, History of Aeronautics in Great Britain, London.JDSBiographical history of technology > Wenham, Francis Herbert
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17 Hertz, Heinrich Rudolph
[br]b. 22 February 1857 Hamburg, Germanyd. 1 January 1894 Bonn, Germany[br]German physicist who was reputedly the first person to transmit and receive radio waves.[br]At the age of 17 Hertz entered the Gelehrtenschule of the Johaneums in Hamburg, but he left the following year to obtain practical experience for a year with a firm of engineers in Frankfurt am Main. He then spent six months at the Dresden Technical High School, followed by year of military service in Berlin. At this point he decided to switch from engineering to physics, and after a year in Munich he studied physics under Helmholtz at the University of Berlin, gaining his PhD with high honours in 1880. From 1883 to 1885 he was a privat-dozent at Kiel, during which time he studied the electromagnetic theory of James Clerk Maxwell. In 1885 he succeeded to the Chair in Physics at Karlsruhe Technical High School. There, in 1887, he constructed a rudimentary transmitter consisting of two 30 cm (12 in.) rods with metal balls separated by a 7.5 mm (0.3 in.) gap at the inner ends and metallic plates at the outer ends, the whole assembly being mounted at the focus of a large parabolic metal mirror and the two rods being connected to an induction coil. At the other side of his laboratory he placed a 70 cm (27½ in.) diameter wire loop with a similar air gap at the focus of a second metal mirror. When the induction coil was made to create a spark across the transmitter air gap, he found that a spark also occurred at the "receiver". By a series of experiments he was not only able to show that the invisible waves travelled in straight lines and were reflected by the parabolic mirrors, but also that the vibrations could be refracted like visible light and had a similar wavelength. By this first transmission and reception of radio waves he thus confirmed the theoretical predictions made by Maxwell some twenty years earlier. It was probably in his experiments with this apparatus in 1887 that Hertz also observed that the voltage at which a spark was able to jump a gap was significantly reduced by the presence of ultraviolet light. This so-called photoelectric effect was subsequently placed on a theoretical basis by Albert Einstein in 1905. In 1889 he became Professor of Physics at the University of Bonn, where he continued to investigate the nature of electric discharges in gases at low pressure until his death after a long and painful illness. In recognition of his measurement of radio and other waves, the international unit of frequency of an oscillatory wave, the cycle per second, is now universally known as the Hertz.[br]Principal Honours and DistinctionsRoyal Society Rumford Medal 1890.BibliographyMuch of Hertz's work, including his 1890 paper "On the fundamental equations of electrodynamics for bodies at rest", is recorded in three collections of his papers which are available in English translations by D.E.Jones et al., namely Electric Waves (1893), Miscellaneous Papers (1896) and Principles of Mechanics (1899).Further ReadingJ.G.O'Hara and W.Pricha, 1987, Hertz and the Maxwellians, London: Peter Peregrinus. J.Hertz, 1977, Heinrich Hertz, Memoirs, Letters and Diaries, San Francisco: San Francisco Press.R.Appleyard, 1930, Pioneers of Electrical Communication.See also: Heaviside, OliverKFBiographical history of technology > Hertz, Heinrich Rudolph
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18 Bergius, Friedrich Carl Rudolf
[br]b. 11 October 1884 Goldschmieden, near Breslau, Germanyd. 31 March Buenos Aires, Argentina[br][br]After studying chemistry in Breslau and Leipzig and assisting inter alia at the institute of Fritz Haber in Karlsruhe on the catalysis of ammonia under high pressure, in 1909 he went to Hannover to pursue his idea of turning coal into liquid hydrocarbon under high hydrogen pressure (200 atm) and high temperatures (470° C). As experiments with high pressure in chemical processes were still in their initial stages and the Technical University could not support him sufficiently, he set up a private laboratory to develop the methods and to construct the equipment himself. Four years later, in 1913, his process for producing liquid or organic compounds from coal was patented.The economic aspects of this process were apparent as the demand for fuels and lubricants increased more rapidly than the production of oil, and Bergius's process became even more important after the outbreak of the First World War. The Th. Goldschmidt company of Essen contracted him and tried large-scale production near Mannheim in 1914, but production failed because of the lack of capital and experience to operate with high pressure on an industrial level. Both capital and experience were provided jointly by the BASF company, which produced ammonia at Merseburg, and IG Farben, which took over the Bergius process in 1925, the same year that the synthesis of hydrocarbon had been developed by Fischer-Tropsch. Two years later, at the Leuna works, almost 100,000 tonnes of oil were produced from coal; during the following years, several more hydrogenation plants were to follow, especially in the eastern parts of Germany as well as in the Ruhr area, while the government guaranteed the costs. The Bergius process was extremely important for the supply of fuels to Germany during the Second World War, with the monthly production rate in 1943–4 being more than 700,000 tonnes. However, the plants were mostly destroyed at. the end of the war and were later dismantled.As a consequence of this success Bergius, who had gained an international reputation, went abroad to work as a consultant to several foreign governments. Experiments aiming to reduce the costs of production are still continued in some countries. By 1925, after he had solved all the principles of his process, he had turned to the production of dextrose by hydrolyzing wood with highly concentrated hydrochloric acid.[br]Principal Honours and DistinctionsNobel Prize 1931. Honorary doctorates, Heidelberg, Harvard and Hannover.Bibliography1907, "Über absolute Schwefelsäure als Lösungsmittel", unpublished thesis, Weida. 1913, Die Anwendung hoher Drucke bei chemischen Vorgängen und eine Nachbildungdes Entstehungsprozesses der Steinkohle, Halle. 1913, DRP no. 301, 231 (coal-liquefaction process).1925, "Verflüssigung der Kohle", Zeitschrift des Vereins Deutscher Ingenieure, 69:1313–20, 1359–62.1933, "Chemische Reaktionen unter hohem Druck", Les Prix Nobel en 1931, Stockholm, pp. 1–37.Further ReadingDeutsches Bergbau-Museum, 1985, Friedrich Bergius und die Kohleverflüssigung. Stationen einer Entwicklung, Bochum (gives a comprehensive and illustrated description of the man and the technology).H.Beck, 1982, Friedrich Bergius, ein Erfinderschicksal, Munich: Deutsches Museum (a detailed biographical description).W.Birkendfeld, 1964, Der synthetische Treibstoff 1933–1945. Ein Beitragzur nationalsozialistischen Wirtschafts-und Rüstungspolitik, Göttingen, Berlin and Frankfurt (describes the economic value of synthetic fuels for the Third Reich).WKBiographical history of technology > Bergius, Friedrich Carl Rudolf
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19 doświadcze|nie
Ⅰ sv doświadczyć Ⅱ n 1. (praktyka) experience U- pracownik z piętnastoletnim doświadczeniem an employee with fifteen years’ experience- lekarz/nauczyciel z dużym doświadczeniem a doctor/teacher with a lot of experience, a very experienced doctor/teacher- nabrać/nabierać doświadczenia to gain experience (w czymś at a. in sth)- zdobyć doświadczenie zawodowe to gain professional experience- to zdolny chłopak, ale brak mu a. nie ma doświadczenia he’s a capable kid, but he lacks experience- mają duże doświadczenie w uczeniu dzieci they have a lot of experience in teaching children- wiedział z doświadczenia, że… he knew from experience that…2. (przeżycie) experience- wstrząsające/pouczające doświadczenie a jarring/an educational experience- doświadczenia wojenne war experiences- nauczona smutnym doświadczeniem już się na to nie zgodzę having learnt (my lesson) the hard way, I won’t agree to that3. (eksperyment) experiment, test (nad czymś on sth)- przeprowadzić doświadczenie to carry out a. do an experiment- doświadczenia na zwierzętach animal experiments- wyniki doświadczeń wskazują… experimental data indicate(s) a. point(s) to…- wynik doświadczenia dowodzi, że… the results of the experiment prove that…- nowe doświadczenia ze szczepionką potwierdziły jej przydatność new experiments with the vaccine have proved its effectiveness4. sgt Filoz. experienceThe New English-Polish, Polish-English Kościuszko foundation dictionary > doświadcze|nie
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20 Lenoir, Jean Joseph Etienne
SUBJECT AREA: Metallurgy, Railways and locomotives, Steam and internal combustion engines, Telecommunications[br]b. 1822 Mussey-la-Ville, Belgiumd. 1900 Verenna Saint-Hildar, France[br]Belgian (naturalized French in 1870) inventor of internal combustion engines, an electroplating process and railway telegraphy systems.[br]Leaving his native village for Paris at the age of 16, Lenoir became a metal enameller. Experiments with various electroplating processes provided a useful knowledge of electricity that showed in many of his later ideas. Electric ignition, although somewhat unreliable, was a feature of the Lenoir gas engine which appeared in 1860. Resembling the steam engine of the day, Lenoir engines used a non-compression cycle of operations, in which the gas-air mixture of about atmospheric pressure was being ignited at one-third of the induction stroke. The engines were double acting. About five hundred of Lenoir's engines were built, mostly in Paris by M.Hippolyte Marinoni and by Lefébvre; the Reading Ironworks in England built about one hundred. Many useful applications of the engine are recorded, but the explosive shock that occurred on ignition, together with the unreliable ignition systems, prevented large-scale acceptance of the engine in industry. However, Lenoir's effort and achievements stimulated much discussion, and N.A. Otto is reported to have carried out his first experiments on a Lenoir engine.[br]Principal Honours and DistinctionsAcadémie des Sciences Prix Montyon Prize 1870. Société d'Encouragement, Silver Prize of 12,000 francs. Légion d'honneur 1881 (for his work in telegraphy).Bibliography8 February 1860, British patent no. 335 (the first Lenoir engine).1861, British patent no. 107 (the Lenoir engine).Further ReadingDugald Clerk, 1895, The Gas and Oil Engine, 6th edn, London, pp. 13–15, 30, 118, 203.World Who's Who in Science, 1968 (for an account of Lenoir's involvement in technology).KABBiographical history of technology > Lenoir, Jean Joseph Etienne
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