was+produced+by

1) (to bring out: She produced a letter from her pocket.) apresentar

2) (to give birth to: A cow produces one or two calves a year.) produzir

3) (to cause: His joke produced a shriek of laughter from the children.) produzir

4) (to make or manufacture: The factory produces furniture.) produzir

5) (to give or yield: The country produces enough food for the population.) produzir

6) (to arrange and prepare (a theatre performance, film, television programme etc): The play was produced by Henry Dobson.) produzir

- producer

SUBJECT AREA: Aerospace

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After receiving his education at Eton and Trinity College, Cambridge, Bacon served with C.A. Parsons at Newcastle upon Tyne from 1925 to 1940. From 1946 to 1956 he carried out research on Hydrox fuel cells at Cambridge University and was a consultant on fuel-cell design to a number of organizations throughout the rest of his life.

Sir William Grove was the first to observe that when oxygen and hydrogen were supplied to platinum electrodes immersed in sulphuric acid a current was produced in an external circuit, but he did not envisage this as a practical source of electrical energy. In the 1930s Bacon started work to develop a hydrogen-oxygen fuel cell that operated at moderate temperatures and pressures using an alkaline electrolyte. In 1940 he was appointed to a post at King's College, London, and there, with the support of the Admiralty, he started full-time experimental work on fuel cells. His brief was to produce a power source for the propulsion of submarines. The following year he was posted as a temporary experimental officer to the Anti-Submarine Experimental Establishment at Fairlie, Ayrshire, and he remained there until the end of the Second World War.

In 1946 he joined the Department of Chemical Engineering at Cambridge, receiving a small amount of money from the Electrical Research Association. Backing came six years later from the National Research and Development Corporation (NRDC), the development of the fuel cell being transferred to Marshalls of Cambridge, where Bacon was appointed Consultant.

By 1959, after almost twenty years of individual effort, he was able to demonstrate a 6 kW (8 hp) power unit capable of driving a small truck. Bacon appreciated that when substantial power was required over long periods the hydrogen-oxygen fuel cell associated with high-pressure gas storage would be more compact than conventional secondary batteries.

The development of the fuel-cell system pioneered by Bacon was stimulated by a particular need for a compact, lightweight source of power in the United States space programme. Electro-chemical generators using hydrogen-oxygen cells were chosen to provide the main supplies on the Apollo spacecraft for landing on the surface of the moon in 1969. An added advantage of the cells was that they simultaneously provided water. NRDC was largely responsible for the forma-tion of Energy Conversion Ltd, a company that was set up to exploit Bacon's patents and to manufacture fuel cells, and which was supported by British Ropes Ltd, British Petroleum and Guest, Keen \& Nettlefold Ltd at Basingstoke. Bacon was their full-time consultant. In 1971 Energy Conversion's operation was moved to the UK Atomic Energy Research Establishment at Harwell, as Fuel Cells Ltd. Bacon remained with them until he retired in 1973.

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SUBJECT AREA: Photography, film and optics

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Auguste and his brother Louis Lumière (b. 5 October 1864 Besançon, France; d. 6 June 1948 Bandol, France) developed the photographic plate-making business founded by their father, Charles Antoine Lumière, at Lyons, extending production to roll-film manufacture in 1887. In the summer of 1894 their father brought to the factory a piece of Edison kinetoscope film, and said that they should produce films for the French owners of the new moving-picture machine. To do this, of course, a camera was needed; Louis was chiefly responsible for the design, which used an intermittent claw for driving the film, inspired by a sewing-machine mechanism. The machine was patented on 13 February 1895, and it was shown on 22 March 1895 at the Société d'Encouragement pour l'In-dustrie Nationale in Paris, with a projected film showing workers leaving the Lyons factory. Further demonstrations followed at the Sorbonne, and in Lyons during the Congrès des Sociétés de Photographie in June 1895. The Lumières filmed the delegates returning from an excursion, and showed the film to the Congrès the next day. To bring the Cinématographe, as it was called, to the public, the basement of the Grand Café in the Boulevard des Capuchines in Paris was rented, and on Saturday 28 December 1895 the first regular presentations of projected pictures to a paying public took place. The half-hour shows were an immediate success, and in a few months Lumière Cinématographes were seen throughout the world.

The other principal area of achievement by the Lumière brothers was colour photography. They took up Lippman's method of interference colour photography, developing special grainless emulsions, and early in 1893 demonstrated their results by lighting them with an arc lamp and projecting them on to a screen. In 1895 they patented a method of subtractive colour photography involving printing the colour separations on bichromated gelatine glue sheets, which were then dyed and assembled in register, on paper for prints or bound between glass for transparencies. Their most successful colour process was based upon the colour-mosaic principle. In 1904 they described a process in which microscopic grains of potato starch, dyed red, green and blue, were scattered on a freshly varnished glass plate. When dried the mosaic was coated with varnish and then with a panchromatic emulsion. The plate was exposed with the mosaic towards the lens, and after reversal processing a colour transparency was produced. The process was launched commercially in 1907 under the name Autochrome; it was the first fully practical single-plate colour process to reach the public, remaining on the market until the 1930s, when it was followed by a film version using the same principle.

Auguste and Louis received the Progress Medal of the Royal Photographic Society in 1909 for their work in colour photography. Auguste was also much involved in biological science and, having founded the Clinique Auguste Lumière, spent many of his later years working in the physiological laboratory.

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to be based on, to lie on, to lie over.

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(v.) = base on/upon, centre around/on/upon, draw from, hinge on/upon, premise upon, rely on/upon, rest on/upon, go by, draw on/upon, predicate on/upon, be conditional on, be grounded in, hang + Posesivo + hat on, pattern, build on/upon

Ex. Other indexes based on titles, both printed and machine-held, may provide access to words other than the first in a title.

Ex. The main body of criticism centred upon the treatment of nonbook materials.

Ex. These headings may be drawn from an alphabetical list of subject headings or from a classification scheme.

Ex. It is important to recognise that citation indexing hinges upon the continuation of documents as separate units and the perpetuation of the practices of citing other words.

Ex. Commentators who assert their views premised upon a unity of aims for SLIS not only fail to appreciate existential realities, they also distort perceptions about what is the best speed of curriculum evolution.

Ex. When BNB began publication in 1950 it relied upon the fourteenth edition of DC.

Ex. Faceted classification rests upon the definition of the concept of a facet.

Ex. The reading habits in some of the lands are difficult to describe as we have little evidence to go by.

Ex. Bay's essay was produced to commemorate the 400th anniversary of Gesner's birth and draws upon a mass of contemporary source material.

Ex. Manegerial decision-making must be predicated upon hard data with an eye toward future trends.

Ex. Development of the right of access to information should, however, be conditional on respect for privacy.

Ex. Carrying this argument one step further, it is not unreasonable to assert that the public library's relationship to its community is grounded in the efforts and attiudes of the library staff.

Ex. There are no great words of wisdom to hang your hat on in these matters.

Ex. Even supposedly local books are generally patterned along Western lines and are unsuitable for any of the courses offered in library schools.

Ex. The system should build on existing resources, rather than develop expensive new programmes.

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(v.) = commemorate + anniversary

Ex. Bay's essay was produced to commemorate the 400th anniversary of Gesner's birth and draws upon a mass of contemporary source material.

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भृगुः 1 N. of a sage, regarded as the ancestor of the family of the Bhṛigus, and described in Ms.1.35 as one of the ten patriarchs created by the first Manu; (said to be so called because he was produced along with flames; सह ज्वालाभिरुत्पन्ने भृगुस्तस्माद् भृगुः स्मृतः ।). [On one occasion when the sages could not agree as to which of the three gods, Brahman, Viṣṇu and Śiva, was best entitled to the worship of Brāhmaṇas, the sage Bhṛigu was sent to test the character of the three gods. He first went to the abode of Brahman, and, on approaching him, purposely omitted an obeisance. Upon this the god reprehended him severely, but was pacified by apologies. Next he entered the abode of Śiva in Kailāsa, and omitted, as before, all tokens of adoration. The vindictive deity was enraged and would have destroyed him, had he not conciliated him by mild words. (According to another account, Bhṛigu was coldly received by Brahman, and he, therefore, cursed him that he would receive no worship or adoration; and condemned Śiva to take the form of a Liṅga, as he got no access to the deity who was engaged in private with his wife). Lastly he went to Viṣṇu, and finding him asleep, he boldly gave the god a kick on his breast which at once awoke him. Instead of showing anger, however, the God arose, and on seeing Bhṛigu, inquired tenderly whether his foot was hurt, and then began to rub it gently. 'This', said Bhṛigu, 'is the mightiest god. He overtops all by the most potent of all weapons--kindness and generosity'. Viṣṇu was therefore, declared to be the god who was best entitled to the worship of all.]

-2 N. of the sage Jamadagni.

-3 An epithet of Śukra.

-4 The planet Venus.

-5 A cliff, precipice; कृत्वा पुंवत्पातमुच्चैर्मृगुभ्यः Śi.4.23; भृगुपतनकारणमपृच्छम् Dk.

-6 Table-land, the level summit of a mountain.

-7 N. of Kṛiṣṇa.

-8 An epithet of Śiva.

-9 Friday.

-Comp. -उद्वहः an epithet of Paraśurāma.

-कच्छः, -च्छम् N. of a place on the north bank of the Narmadā (modern Broach).

-जः, -तनयः 1 an epithet of Śukra.

-2 the planet Venus.

-नन्दनः 1 an epithet of Paraśurāma; वीरो न यस्य भगवान् भृगुनन्दनो$पि U.5.34.

-2 of Śukra.

-3 of Śaunaka; एवं निशम्य भृगुनन्दनसाधुवादम् Bhāg.1.1. 14.

-पतनम् a fall from a precipice.

-पतिः an epithet of Paraśurāma; भृगुपतियशोवर्त्म यत् क्रौञ्चरन्ध्रम् Me.59; so भृगूणांपतिः.

-पातः Throwing oneself down from a cliff or a precipice; thus committing suicide; तत्र तत्यजुरा मानं भृगुपातेन केचन Śiva B.2.39.

-वंशः N. of a family descended from Paraśurāma;.

-वारः, -वासरः Friday.

-शार्दूलः, -श्रेष्ठः, -सत्तमः epithets of Paraśurāma;.

-सुतः, -सूनुः 1 an epithet of Paraśurāma;.

-2 of Venus or Śukra; भृगुसूनुधरापुत्रौ शशिजेन समन्वितौ Mb.9.11.17.

SUBJECT AREA: Paper and printing

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The son of a master weaver, he originally wished to become an engineer, but while remaining in the parental home he had to follow his father's trade in the textile industry, becoming a master weaver himself in 1839 at Hainichen. He was a good observer and a keen model maker. It was at this stage, in the early 1840s, that he began experimenting with a new material for papermaking. Until then the raw material had been waste rag from the textile industry, but the ever-increasing demands of the mechanical printing presses, especially those producing newspapers, were beginning to outstrip supply. Keller tried using pine wood ground with a wet grindstone. The mass of fibres that resulted was then heated with water to form a thick brew which he then strained through a cloth. By this means Keller obtained a pulp that could be used for papermaking. He constructed a simple grinding machine that could disintegrate the wood without splinters; this was used to make paper in the Altchemnitzer paper mill, and the newspaper Frankenberger Intelligenz-und Wochenblatt was the first to be printed on wood-pulp paper. Keller could not secure state funds to promote his invention, so he approached an expert in papermaking, Heinrich Voelter, Technical Director of the Vereinigten Bautzener Papierfabrik. Voelter put up 700 thaler, and in August 1845 the state of Saxony granted a patent in both their names. In 1848 the first practical machine for grinding wood was produced, but four years later the patent expired. Unfortunately Keller could not afford the renewal fee, and it was Voelter who developed the process of wood-pulp papermaking under his own name, leaving Keller behind. Without this invention, the output of paper from the mills could not have kept pace with the demands of the printing industry, and the mass readership that these technological developments made possible could not have been served. It is no fault of Keller's that wood-pulp paper contains within itself the seeds of its own deterioration and ultimate destruction, presenting librarians of today with an intractable problem of preservation. Keller's part in this technical breakthrough is established in his "ideas" notebook covering the years 1841 and 1842, preserved in the museum at Hainichen.

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noun

1 cosecha

■ what vintage is it? ¿de qué cosecha es?

adjective

1 (wine) de añada

2 (classic) clásico,-a; (high-quality) glorioso,-a, maravilloso,-a

■ this has been a vintage year for the theatre in London este año ha sido glorioso para el teatro en Londres

3 familiar lo mejor de

■ this opera is vintage Pavarotti esta ópera es de lo mejorcito de Pavarotti

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vintage car coche nombre masculino de época construido entre 1919 y 1930

vintage ['vɪntɪʤ] adj

1) : añejo (dícese de un vino)

2) classic: clásico, de época

vintage n

1) : cosecha f

the 1947 vintage: la cosecha de 1947

2) era: época f, era f

slang of recent vintage: argot de la época reciente

• clásico, -a adj.

• de época adj.

• cosecha s.f.

• vendimia (Agricultura) s.f.

a) (wine, year) cosecha f

b) (harvest, season) vendimia f

adjective (before n, no comp)

a) < wine> añejo

b) (outstanding, classic) excelente

c) ( typical) típico

N (=season, harvest) vendimia f ; (=year) cosecha f, añada f

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a) (wine, year) cosecha f

b) (harvest, season) vendimia f

adjective (before n, no comp)

a) < wine> añejo

b) (outstanding, classic) excelente

c) ( typical) típico

. проверка на месте; удерживать на месте

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The principal dimensions of the arch may be dictated by the conditions at the site.

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These units will be assembled at site.

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The magnetic field was scanned with plugs in position.

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This is a method for in situ insulation.

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The units may be fitted to an existing valve in situ.

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We found a locally available supply of aggregate.

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On-the-site casting of concrete.

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An on-the-spot investigation was conducted.

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Towers are assembled on the spot by the erecting crew.

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An extensive theoretical analysis was followed by a detailed on-site measurement programme.

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 The fuel processing for the semiclean liquid fuel was off site; the low-Btu gas was produced on site.

 Manufacturers typically recommend on-site replacement of the entire assembly when servicing is necessary.

 The calibration was performed in situ, and under the same conditions of operation that are present when the tests are performed.

 A better procedure is to calibrate in-place or on-line so that stresses and connection errors are acknowledged and eliminated as random, unknown errors.

 So our analyst, with the help of a pool of experts, can frequently restore your terminals on the spot.

 The Model 572 permits sophisticated measurement and control functions, as well as on-the-spot calibration.

 All parameters, except smoke, are recorded locally and are transmitted to the data acquisition system.

SUBJECT AREA: Electricity, Land transport, Railways and locomotives

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Davidson, son of an Aberdeen merchant, attended Marischal College, Aberdeen, between 1819 and 1822: his studies included mathematics, mechanics and chemistry. He subsequently joined his father's grocery business, which from time to time received enquiries for yeast: to meet these, Davidson began to manufacture yeast for sale and from that start built up a successful chemical manufacturing business with the emphasis on yeast and dyes. About 1837 he started to experiment first with electric batteries and then with motors. He invented a form of electromagnetic engine in which soft iron bars arranged on the periphery of a wooden cylinder, parallel to its axis, around which the cylinder could rotate, were attracted by fixed electromagnets. These were energized in turn by current controlled by a simple commutaring device. Electric current was produced by his batteries. His activities were brought to the attention of Michael Faraday and to the scientific world in general by a letter from Professor Forbes of King's College, Aberdeen. Davidson declined to patent his inventions, believing that all should be able freely to draw advantage from them, and in order to afford an opportunity for all interested parties to inspect them an exhibition was held at 36 Union Street, Aberdeen, in October 1840 to demonstrate his "apparatus actuated by electro-magnetic power". It included: a model locomotive carriage, large enough to carry two people, that ran on a railway; a turning lathe with tools for visitors to use; and a small printing machine. In the spring of 1842 he put on a similar exhibition in Edinburgh, this time including a sawmill. Davidson sought support from railway companies for further experiments and the construction of an electromagnetic locomotive; the Edinburgh exhibition successfully attracted the attention of the proprietors of the Edinburgh 585\& Glasgow Railway (E \& GR), whose line had been opened in February 1842. Davidson built a full-size locomotive incorporating his principle, apparently at the expense of the railway company. The locomotive weighed 7 tons: each of its two axles carried a cylinder upon which were fastened three iron bars, and four electromagnets were arranged in pairs on each side of the cylinders. The motors he used were reluctance motors, the power source being zinc-iron batteries. It was named Galvani and was demonstrated on the E \& GR that autumn, when it achieved a speed of 4 mph (6.4 km/h) while hauling a load of 6 tons over a distance of 1 1/2 miles (2.4 km); it was the first electric locomotive. Nevertheless, further support from the railway company was not forthcoming, although to some railway workers the locomotive seems to have appeared promising enough: they destroyed it in Luddite reaction. Davidson staged a further exhibition in London in 1843 without result and then, the cost of battery chemicals being high, ceased further experiments of this type. He survived long enough to see the electric railway become truly practicable in the 1880s.

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PJGR / GW

G, g, indecl. n. or (on account of littera) f., had originally no place in the Latin alphabet: both the sharp and the flat guttural mutes, our k and g sounds, being represented by C; hence on the Columna Rostrata LECIONES, MACISTRATOS, EXFOCIONT, (pu)CNANDOD, PVCN(ad), CARTACINIENSIS, for legiones, etc.; hence, too, the archaic form ACETARE for agitare (v. Paul. ex Fest. p. 23 Müll. N. cr.), and the still common abbreviation of the names Gaius and Gneus in C and Cn.—At a later period (acc. to Plut. Qu. Rom. p. 277 D and 278 E, by means of a freedman of Spurius Carvilius Ruga, about the beginning of the second Punic war) a slight graphic alteration was made in the C, which introduced into the Roman orthography the letter G (on the old monuments C); thus we have in the S. C. de Bacchanal.: MAGISTER, MAGISTRATVM, FIGIER, GNOSCIER, AGRO; on the other hand, the orthography GNAIVOD PATRE PROGNATVS on the first Epitaph of the Scipios, which dates before that time, indicates either incorrectness in the copying or a later erection of the monument. When Greek words are written in Latin letters and vice versa, G always corresponds to G. Its sound was always hard, like Engl. g in gate, at least until the sixth century A. D.As an initial, g, in pure Latin words, enters into consonantal combination only with l and r; and therefore in words which, from their etymology, had the combination gn, the g was rejected in the classical period, and thus arose the class. forms nascor, natus, nosco, novi, notus, narus, navus, from the original gnascor, gnatus, gnosco, etc. (cf. the English gnaw, gnat, gnarr, etc., where the g has become silent); whereas in compounds the g again is often retained: cognatus, cognosco, ignarus, ignavus.—An initial g is dropped in lac (kindred to GALACT, gala), likewise in anser (kindred to Germ. Gans; Sanscr. hansa; Greek chên).As a medial, g combines with l, m, n, r, although it is sometimes elided before m in the course of formation; so in examen for exagmen from agmen; in contamino for contagmino (from con-TAG, tango). Before s the soft sound of g passes into the hard sound of c, and becomes blended with the s into x (v. the letter X); though sometimes the g (or c) is elided altogether, as in mulsi from mulgeo, indulsi from indulgeo; cf.: sparsus, mersus, tersus, etc. So too before t, as indultum from indulgeo. The medial g is often dropped between two vowels, and compensated for by lengthening the preced. vowel: māior from măgior, pulēium from pulēgium, āio from ăgio (root AG, Sanscr. ah, to say; cf. nego). Likewise the medial g is dropped in lēvis for legvis, Sanscr. laghn, fava for fagva, fruor for frugvor, flamma for flagma, stimulus for stigmulus, examen for exagmen; jumentum, from root jug-: sumen from sug-; cf.: umor, flamen, etc.As a final, g was only paragogic, acc. to Quint. 1, 7, 13, in the obsolete VESPERVG (for vesperu, analogous with noctu; v. Spald. ad loc.). Etymologically, g corresponds to an original Indo - European g or gh, or is weakened from c, k. Thus it stands where in Greek we have:

g, as ago, agô; ager, agros; argentum, arguros; genus, genos; fulgeo, phlegô, and so very commonly;

ch (usually before r, or in the middle of a word): ango, anchô; rigo, brechô; gratus, chairô, etc.;

k: viginti, eikosi; gubernator, kubernêtês; gummi, kommi, etc.—By assimilation, g was produced from b and d in oggero, suggero, aggero, etc., from obgero, sub-gero, ad-gero, etc.As an abbreviation, G denotes Galliarum, Gallica, gemina, Germania, genius, etc.; and sometimes Gaius (instead of the usual C); v. Inscr. Orell. 467; 1660; 4680:

G.P.R.F. genio populi Romani feliciter,

Inscr. Orell. 4957; v. Corss. Ausspr. 1, 76 sqq.; Roby, Lat. Gr. 1, 38 sqq.

G, g, indecl. n. or (on account of littera) f., had originally no place in the Latin alphabet: both the sharp and the flat guttural mutes, our k and g sounds, being represented by C; hence on the Columna Rostrata LECIONES, MACISTRATOS, EXFOCIONT, (pu)CNANDOD, PVCN(ad), CARTACINIENSIS, for legiones, etc.; hence, too, the archaic form ACETARE for agitare (v. Paul. ex Fest. p. 23 Müll. N. cr.), and the still common abbreviation of the names Gaius and Gneus in C and Cn.—At a later period (acc. to Plut. Qu. Rom. p. 277 D and 278 E, by means of a freedman of Spurius Carvilius Ruga, about the beginning of the second Punic war) a slight graphic alteration was made in the C, which introduced into the Roman orthography the letter G (on the old monuments C); thus we have in the S. C. de Bacchanal.: MAGISTER, MAGISTRATVM, FIGIER, GNOSCIER, AGRO; on the other hand, the orthography GNAIVOD PATRE PROGNATVS on the first Epitaph of the Scipios, which dates before that time, indicates either incorrectness in the copying or a later erection of the monument. When Greek words are written in Latin letters and vice versa, G always corresponds to G. Its sound was always hard, like Engl. g in gate, at least until the sixth century A. D.As an initial, g, in pure Latin words, enters into consonantal combination only with l and r; and therefore in words which, from their etymology, had the combination gn, the g was rejected in the classical period, and thus arose the class. forms nascor, natus, nosco, novi, notus, narus, navus, from the original gnascor, gnatus, gnosco, etc. (cf. the English gnaw, gnat, gnarr, etc., where the g has become silent); whereas in compounds the g again is often retained: cognatus, cognosco, ignarus, ignavus.—An initial g is dropped in lac (kindred to GALACT, gala), likewise in anser (kindred to Germ. Gans; Sanscr. hansa; Greek chên).As a medial, g combines with l, m, n, r, although it is sometimes elided before m in the course of formation; so in examen for exagmen from agmen; in contamino for contagmino (from con-TAG, tango). Before s the soft sound of g passes into the hard sound of c, and becomes blended with the s into x (v. the letter X); though sometimes the g (or c) is elided altogether, as in mulsi from mulgeo, indulsi from indulgeo; cf.: sparsus, mersus, tersus, etc. So too before t, as indultum from indulgeo. The medial g is often dropped between two vowels, and compensated for by lengthening the preced. vowel: māior from măgior, pulēium from pulēgium, āio from ăgio (root AG, Sanscr. ah, to say; cf. nego). Likewise the medial g is dropped in lēvis for legvis, Sanscr. laghn, fava for fagva, fruor for frugvor, flamma for flagma, stimulus for stigmulus, examen for exagmen; jumentum, from root jug-: sumen from sug-; cf.: umor, flamen, etc.As a final, g was only paragogic, acc. to Quint. 1, 7, 13, in the obsolete VESPERVG (for vesperu, analogous with noctu; v. Spald. ad loc.). Etymologically, g corresponds to an original Indo - European g or gh, or is weakened from c, k. Thus it stands where in Greek we have:

g, as ago, agô; ager, agros; argentum, arguros; genus, genos; fulgeo, phlegô, and so very commonly;

ch (usually before r, or in the middle of a word): ango, anchô; rigo, brechô; gratus, chairô, etc.;

k: viginti, eikosi; gubernator, kubernêtês; gummi, kommi, etc.—By assimilation, g was produced from b and d in oggero, suggero, aggero, etc., from obgero, sub-gero, ad-gero, etc.As an abbreviation, G denotes Galliarum, Gallica, gemina, Germania, genius, etc.; and sometimes Gaius (instead of the usual C); v. Inscr. Orell. 467; 1660; 4680:

G.P.R.F. genio populi Romani feliciter,

Inscr. Orell. 4957; v. Corss. Ausspr. 1, 76 sqq.; Roby, Lat. Gr. 1, 38 sqq.

SUBJECT AREA: Steam and internal combustion engines

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During the thirty years prior to his death, Brayton devoted considerable effort to the development of internal-combustion engines. He designed the first commercial gas engine of American origin in 1872. An oil-burning engine was produced in 1875. An aptitude for mechanical innovation became apparent whilst he was employed at the Exeter Machine Works, New Hampshire, where he developed a successful steam generator for use in domestic and industrial heating systems. Brayton engines were distinguished by the method of combustion. A pressurized air-fuel mixture from a reservoir was ignited as it entered the working cylinder—a precursor of the constant-pressure cycle. A further feature of these early engines was a rocking beam. There exist accounts of Brayton engines fitted into river craft, and of one in a carriage which operated for a few months in 1872–3. However, the appearance of the four-stroke Otto engine in 1876, together with technical problems associated with backfiring into the fuel reservoir, prevented large-scale acceptance of the Brayton engine. Although Thompson Sterne \& Co. of Glasgow became licensees, the engine failed to gain usage in Britain. A working model of Brayton's gas engine is exhibited in the Museum of History and Technology in Washington, DC.

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SUBJECT AREA: Chemical technology

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Between 1811 and 1823, Chevreul's work on the fundamental basis of fats led to a great improvement in both the quality of wax candles and in the fats used in the manufacture of soap, and this had considerable advantageous implications for domestic life. The publication of his researches provided the first specific account of the nature of the fats used in the manufacture of soap. His work also led to the development and manufacture of the stearine candle. Stearine was first described by Chevreul in 1814 and was produced by heating glycerine with stearic acid. As early as 1825 M.Gay Lussac obtained a patent in England for making candles from a similar substance. The stearine candle was much more satisfactory than earlier products; it was firmer and gave a brighter light without any accompanying odour. Chevreul became Director of Dyeing in 1824 at the Royal Manufactory of Gobelins, the French national tapestry firm. While there, he carried out research into 1,442 different shades of colour. From 1830 he occupied the Chair of Chemistry at the Muséum d'Histoire Naturelle in Paris.

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SUBJECT AREA: Horology

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Shortt entered the Engineering Department of the London and South Western Railway as an engineering cadet in 1902, remaining with the company and its successors until he retired in 1946. He became interested in precision horology in 1908, when he designed an instrument for recording the speed of trains; this led to a long and fruitful collaboration with Frank HopeJones, the proprietor of the Synchronome Company. This association culminated in the installation of a free-pendulum clock, with an accuracy of the order of one second per year, at Edinburgh Observatory in 1921. The clock's performance was far better than that of existing clocks, such as the Riefler, and a slightly modified version was produced commercially by the Synchronome Company. These clocks provided the time standard at Greenwich and many other observatories and scientific institutions across the world until they were supplanted by the quartz clock.

The period of a pendulum is constant if it swings freely with a constant amplitude in a vacuum. However, this ideal state cannot be achieved in a clock because the pendulum must be impulsed to maintain its amplitude and the swings have to be counted to indicate time. The free-pendulum clock is an attempt to approach this ideal as closely as possible. In 1898 R.J. Rudd used a slave clock, synchronized with a free pendulum, to time the impulses delivered to the free pendulum. This clock was not successful, but it provided the inspiration for Shortt's clock, which operates on the same principle. The Shortt clock used a standard Synchronome electric clock as the slave, and its pendulum was kept in step with the free pendulum by means of the "hit and miss" synchronizer that Shortt had patented in 1921. This allowed the pendulum to swing freely (in a vacuum), apart from the fraction of a second in which it received an impulse each half-minute.

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See also: Marrison, Warren Alvin

m. (ifc. f. ā) native place Vishṇ. ;

. быть вызванным; возникать в результате; объясняться; относить за счёт; являться результатом

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The unstable slope conditions were brought on by the permafrost.

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The phase difference is accountable (or chargeable) to gravity.

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The high levels of alkaline phosphatase may be associated with a tumor of...

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Laser-excited molecular fluorescence can be caused by species present in the flame gases.

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The fire was set by lightning.

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The ionization was produced by the charged particle.

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Such spectra are not sufficiently well resolved, which owes to the broad fluorescent vibronic bands.

•

The strain is brought about (or caused) by pressure.

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Errors that may arise (or stem) from such disturbances...

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The production of foam is associated with a decrease in surface tension.

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These faults are attributable (or may be attributed) to the video head assembly.

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The fluctuations are due to roll eccentricity.

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The fire was induced by lightning.

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When combustion originates from local exposure...

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This increase results from (or is caused by, or stems from, or arises from, or is due to, or is brought about by)...

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These problems spring (or derive) from a number of different demands.

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This effect stems (or derives) from (or is due to, or is caused by) reduced blood circulation.

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Acute insufficiency may be triggered (or caused, or occasioned) by a generalized infection or massive stress.

•

A major earthquake has never been triggered by a nuclear test explosion.

. быть вызванным; возникать в результате; объясняться; относить за счёт; являться результатом

•

The unstable slope conditions were brought on by the permafrost.

•

The phase difference is accountable (or chargeable) to gravity.

•

The high levels of alkaline phosphatase may be associated with a tumor of...

•

Laser-excited molecular fluorescence can be caused by species present in the flame gases.

•

The fire was set by lightning.

•

The ionization was produced by the charged particle.

•

Such spectra are not sufficiently well resolved, which owes to the broad fluorescent vibronic bands.

•

The strain is brought about (or caused) by pressure.

•

Errors that may arise (or stem) from such disturbances...

•

The production of foam is associated with a decrease in surface tension.

•

These faults are attributable (or may be attributed) to the video head assembly.

•

The fluctuations are due to roll eccentricity.

•

The fire was induced by lightning.

•

When combustion originates from local exposure...

•

This increase results from (or is caused by, or stems from, or arises from, or is due to, or is brought about by)...

•

These problems spring (or derive) from a number of different demands.

•

This effect stems (or derives) from (or is due to, or is caused by) reduced blood circulation.

•

Acute insufficiency may be triggered (or caused, or occasioned) by a generalized infection or massive stress.

•

A major earthquake has never been triggered by a nuclear test explosion.