not+subject+to+another

1. vi (aus essere)

1) (persona, veicolo) to go by, pass (by)

2) (fare una breve sosta) to call in, (presso amico) to call o drop in, (postino) to come, call

3) (filtrare attraverso: aria, sole, luce) to pass, get through, (acqua) to seep through

4)

5) (trascorrere: giorni, tempo) to pass, go by

6) (allontanarsi: temporale, dolore, voglia) to pass, go away

7) (essere accettato: proposta di legge) to be passed, (candidato) to pass

8) Culin

9) Carte to pass

10)

11)

12)

13)

2. vt

1) (attraversare) to cross

2) (esame) to pass, (dogana) to go through, clear, (visita medica) to have

3) (approvare) to pass, approve

4)

5) (trascorrere) to spend, pass

6) (oltrepassare, sorpassare) to go beyond, (fig : andare oltre i limiti) to exceed, go beyond

7) (dare: oggetto) to pass, give, hand, (Sport: palla) to pass

8) (brodo, verdura) to strain

9)

10)

3. sm

   1) The Mind Is Entirely Distinct from Body

   From this I knew that I was a substance the whole essence or nature of which is to think, and that for its existence there is no need of any place, nor does it depend on any material thing; so that this "me," that is to say, the soul by which I am what I am, is entirely distinct from body, and is even more easy to know than is the latter; and even if body were not, the soul would not cease to be what it is. (Descartes, 1970a, p. 101)

   2) Critique of the Cartesian View

    still remains to be explained how that union and apparent intermingling [of mind and body]... can be found in you, if you are incorporeal, unextended and indivisible.... How, at least, can you be united with the brain, or some minute part in it, which (as has been said) must yet have some magnitude or extension, however small it be? If you are wholly without parts how can you mix or appear to mix with its minute subdivisions? For there is no mixture unless each of the things to be mixed has parts that can mix with one another. (Gassendi, 1970, p. 201)

   3) The Union That Exists between the Body and the Mind

   here are... certain things which we experience in ourselves and which should be attributed neither to the mind nor body alone, but to the close and intimate union that exists between the body and the mind.... Such are the appetites of hunger, thirst, etc., and also the emotions or passions of the mind which do not subsist in mind or thought alone... and finally all the sensations. (Descartes, 1970b, p. 238)

   4) Psychology Is Not the Study of Disembodied Minds

   With any other sort of mind, absolute Intelligence, Mind unattached to a particular body, or Mind not subject to the course of time, the psychologist as such has nothing to do. (James, 1890, p. 183)

   5) Each Mental Event Can Be Reduced to a Neural Event

   [The] intention is to furnish a psychology that shall be a natural science: that is to represent psychical processes as quantitatively determinate states of specifiable material particles, thus making these processes perspicuous and free from contradiction. (Freud, 1966, p. 295)

   6) The Thesis Is That the Mental Is Nomologically Irreducible

   The thesis is that the mental is nomologically irreducible: there may be true general statements relating the mental and the physical, statements that have the logical form of a law; but they are not lawlike (in a strong sense to be described). If by absurdly remote chance we were to stumble on a non-stochastic true psychophysical generalization, we would have no reason to believe it more than roughly true. (Davidson, 1970, p. 90)

   7) The Doctrine That Men Are Machines

   We can divide those who uphold the doctrine that men are machines, or a similar doctrine, into two categories: those who deny the existence of mental events, or personal experiences, or of consciousness;... and those who admit the existence of mental events, but assert that they are "epiphenomena"-that everything can be explained without them, since the material world is causally closed. (Popper & Eccles, 1977, p. 5)

   8) Brain- Mind Interaction

   Mind affects brain and brain affects mind. That is the message, and by accepting it you commit yourself to a special view of the world. It is a view that shows the limits of the genetic imperative on what we turn out to be, both intellectually and emotionally. It decrees that, while the secrets of our genes express themselves with force throughout our lives, the effect of that information on our bodies can be influenced by our psychological history and beliefs about the world. And, just as important, the other side of the same coin argues that what we construct in our minds as objective reality may simply be our interpretations of certain bodily states dictated by our genes and expressed through our physical brains and body. Put differently, various attributes of mind that seem to have a purely psychological origin are frequently a product of the brain's interpreter rationalizing genetically driven body states. Make no mistake about it: this two-sided view of mind-brain interactions, if adopted, has implications for the management of one's personal life. (Gazzaniga, 1988, p. 229)

1) General subject: foreign, non-resident, non-Cossack (as used by Cossacks), from another city, from another town, not local, of another town

2) Business: nonresident

गन्धः [गन्ध्-पचाद्यच्]

1 Smell, odour; गन्धमाघ्राय चोर्व्याः Me.21; अपघ्नन्तो दुरितं हव्यगन्धैः Ś.4.8; R.12.27. (गन्ध is changed to गन्धि when as the last member of a Bah. comp. it is preceded by उद्, पूति, सु, सुरभि, or when the compound implies comparison; सुगन्धि, सुरभिगन्धि, कमलगन्धि मुखम्; शालिनिर्यासगन्धिभिः R.1.38; आहुति˚ 1.53; also when गन्ध is used in the sense of 'a little').

-2 Smell considered as one of the 24 properties or guṇas of the Vaiśeṣikas; it is a property characteristic of पृथिवी or earth which is defined as गन्धवती पृथ्वी T. S.

-3 The mere smell of anything, a little, a very small quantity; घृतगन्धि भोजनम् Sk.

-4 A perfume, any fra- grant substance; एषा मया सेविता गन्धयुक्तिः Mk.8; Y.1. 231; Mu.1.4.

-5 Sulphur.

-6 Pounded sandal wood.

-7 Connection, relationship.

-8 A neighbour.

-9 Pride, arrogance; as in आत्तगन्ध humbled or mortified.

-1 An epithet of Śiva.

-11 A sectarial mark on the forehead.

-12 Similarity (सादृश्य); डुण्डुभानहिगन्धेन न त्वं हिंसितुमर्हसि Mb.1.1.3.

-न्धम् 1 Smell.

-2 Black aloe- wood.

-Comp. -अधिकम् a kind of perfume.

-अपकर्ष- णम् removing smells.

-अम्बु n. fragrant water.

-अम्ला the wild lemon tree.

-अश्मन् m. sulphur....... गन्धा- श्मानं मनःशिलाम् । Śiva. B.3.19.

-अष्टकम् a mixture of 8 fragrant substances offered to deities, varying in kind according to the nature of the deity to whom they are offered. Generally sandal, camphor, saffron, उशीर, cyperus pertenuis (Mar. नागरमोथा), गोरोचन, देवदार and a flower are used in the mixture.

-आखुः the musk-rat.

-आजीवः a vendor of perfumes.

-आढ्य a. rich in odour, very fragrant; स्रजश्चोत्तमगन्धाढ्याः Mb. (

-ढ्यः) the orange tree. (

-ढ्यम्) sandal-wood.

-इन्द्रियम् the organ of smell.

-इभः, -गजः, -द्विपः, -हस्तिन् m. 'the scent- elephant', an elephant of the best kind; यस्य गन्धं समाघ्राय न तिष्ठन्ति प्रतिद्विपाः । स वै गन्धगजो नाम नृपतेर्विजयावहः ॥ Pālakāpyam; शमयति गजानन्यान्गन्धद्विपः कलभो$पि सन् V.5. 18; R.6.7;17.7; गन्धेन जेतुः प्रमुखागतस्य गन्धद्विपस्येव मतङ्गजौघः । Ki.17.17.

-उत्तमा spirituous liquor.

-उदम् scented water; Bhāg.9.11.26.

-उपजीविन् m. one who lives by perfumes, a perfumer.

-ओतुः (forming गन्धोतु वार्तिक or गन्धौतु) the civet cat.

-कारिका 1 a female servant whose business is to prepare perfumes.

-2 a female artisan living in the house of another, but not alto- gether subject to another's control.

-कालिका, -काली f. N. of Satyavatī, mother of Vyāsa; Mb.1.

-काष्ठम् aloe-wood.

-कुटी 1 a kind of perfume.

(-टिः, -टी) -2 The Buddhist temple, any chamber used by Buddha; पुण्योद्देशवशाच्चकार रुचिरां शौद्धोदनेः श्रद्धया । श्रीमद्गन्धकुटीमिमामिव कुटीं मोक्षस्य सौख्यस्य च ॥ (An inscription at Gayā V.9. Ind. Ant. Vol.X).

-केलिका, -चेलिका musk.

-ग a.

1 taking a scent, smelling.

-2 redolent.

-गजः see गन्धेभ.

-गुण a. having the property of odour.

-घ्राणम् the smelling of any odour.

-चरा f. The fourth stage of must of an elephant; Mātaṅga L.9.15.

-जलम् fragrant water; सिक्तां गन्धजलैः Bhāg.1.11.14.

-ज्ञा the nose.

-तूर्यम् a musical instrument of a loud sound used in battle (as a drum or trumpet).

-तैलम् 1 a fragrant oil, a kind of oil prepared with fragrant substances.

-2 sul- phur-butter.

-दारु n. aloe-wood.

-द्रव्यम् a fragrant sub- stance.

-द्वार a. perceptible through the odour.

-धारिन् a. bearing fragrance. (-m.) an epithet of Śiva.

-धूलिः f. musk.

-नकुलः the musk-rat.

-नालिका, -नाली the nose.

-निलया a kind of jasmine.

-पः N. of a class of manes.

-पत्रा, -पलाशी a species of zedoary.

-पलाशिका turmeric.

-पालिन् m. an epithet of Śiva.

-पाषाणः sulphur.

-पिशाचिका the smoke of burnt fragrant resin (so called from its dark colour or cloudy nature, or perhaps from its attracting demons by fragrance).

-पुष्पः 1 the Vetasa plant.

-2 The Ketaka plant.

(-ष्पम्) 1 a fragrant flower.

-2 flowers and sandal offered to dei- ties at the time of worship.

-पुष्पा an indigo plant.

-पूतना a kind of imp or goblin.

-फली 1 the Priyañgu creeper.

-2 a bud of the Champaka tree.

-बन्धुः the mango tree.

-मातृ f. the earth.

-मादन a. intoxicating with fragrance.

(-नः) 1 a large black bee.

-2 sul- phur.

-3 an epithet of Rāvaṇa. (

-नः, -नम्) N. of a particular mountain to the east of Meru, renowned for its fragrant forests (

-नम्) the forest on this mountain.

-मादनी spirituous liquor.

-मादिनी lac.

-मार्जारः the civet cat.

-मुखा, -मूषिकः, -मूषी f. the musk rat.

-मृगः 1 the civet cat.

-2 the musk-deer.

-मैथुनः a bull.

-मोदनः sulphur.

-मोहिनी a bud of the Champaka tree.

-युक्तिः f. preparation of perfumes.

-रसः myrrh (Mar. रक्त्याबोळ); लाक्षां गन्धरसं चापि...... Śiva. B.3.2. ˚अङ्गकः turpentine.

-राजः a kind of jasmine.

(-जम्) 1 a sort of perfume.

-2 sandal-wood.

-लता the Pri- yañgu creeper.

-लोलुपा 1 a bee.

-2 a fly or gnat.

-वहः the wind; रात्रिंदिवं गन्धवहः प्रयाति Ś.5.4; दिग्दक्षिणा गन्धवहं मुखेन Ku.3.25.

-वहा the nose.

-वाहः 1 the wind; देहं दहन्ति दहना इव गन्धवाहाः Bv.1.14.

-2 the musk-deer.

-वाही the nose.

-विह्वलः wheat.

-वृक्षकः, -वृक्ष the Śāla tree.

-व्याकुलम् a kind of fragrant berry (कक्कोल.)

-शुण़्डिनी the musk-rat.

-शेखरः musk.

-सारः 1 sandal.

-2 a kind of jasmine.

-सुखी, -सूयी the musk shrew.

-सोमम् the white water-lily.

-हस्तिन् m. a scent-elephant; यस्य गन्धं समाघ्राय न तिष्ठन्ति प्रतिद्विपाः । तं गन्धहस्तिनं प्राहुर्नृपतोर्विजयावहम् ॥ Pālakāpyam.

-हारिका a female servant whose business is to prepare perfumes; cf. गन्धकारिका.

परवत् a.

1 Dependent upon or subject to another, ready to obey; सा बाला परवतीति मे विदितम् Ś.3.2; भगवन्- परवानयं जनः R.8.81;2.56; oft. with instr. or loc. of person; भ्रात्रा यदित्थं परवानसि त्वम् R.14.59.

-2 Deprived of strength, rendered powerless; परवानिव शरीरोपतापेन Māl.3.

-3 Completely under the influence of (another), not master of oneself, overpowered or overcome; विस्मयेन परवानस्नि U.5; आनन्देन परवानस्मि U.3; साध्वसेन Māl.6.

-4 Devoted to.

mfn. not subject to the orders of another, not giving a counter orﾠ rival order, completely under subjection

* * *

(að), v.

1) to bind in duty, oblige (konungrum skyldaði þá til at flytja líkin til graptar);

2) s. til e-s, to deserve, merit.

1) due, tax, tribute (fekk hann þaðan engar skyldur né skatta);

2) duty (er þat yðvarr réttr ok s. at verja ríki várt);

3) relationship (eigi veit ek, at með okkr sé nein s.).

* * *

d and að. to bind in duly, oblige, enjoin; allra þeirra orða, er yðr skylda lög til um at bera, Nj. 208; er þá skylda lög til, Grág. i. 8; en þat skyldar mik til at ríta, Bs. i. 59; konungr skyldaði þá til at flytja líkin til graptar, Fms. viii. 231; ek em skyldaðr til at blóta, 656 B. 9; vera til skyldaðr, H. E. i. 471: hverrgi má skylda annan til garðlags, Grág. ii. 262; skylda ek ykkr heldr til þessa enn aðra menn, at …, Fms. i. 189; því skyldi ek þik til blóta, 656 B. 4; hann skyldir mik at fella tár, Eluc. 56; nauðr skyldi yðr til, urged you, Bjarn. 54: láta þeir sem eingu ætti við aðra at skylda, as if they had no concern with one another, Band. 4 new Ed.

II. reflex., því skyldumk vér, 671. 3, Stj. 151, H. E. i. 410; skyldask um e-t, to be made responsible for, K. Á. 82: to be prescribed, þá hluti er eigi skyldask tiundar-görð af, which are not subject to a tithe, id.; hverjar pínur skyldask á þá menn, 224, Stj. 46.

u, f. a due, tax, tribute; þeir (the kings) fengu engar skyldur í Þrándheimi, Fms. i. 49; þangat liggr tíund, lýsi-tollar, … öll önnur skylda liggr til Hváls, Vm. 96: = skyldleikr, N. G. L. i. 350. But usually skyld is the legal and skylda the moral term.

II. one’s duty, Fms. i. 52, vii. 280, K. Á. 134; er þat vist hans skylda, it is his duty, Sks. 599; and so in countless instances, esp. in eccl. writers, skyldan við Guð, s. við náungann.

COMPDS: skylduembætti, skylduhjón, skylduhlýðni, skyldulauss, skylduliga, skylduligr, skyldusöngr.

• Более подробное обсуждение предмета дано Смитом [1]. - A more detailed discussion of the subject is given by Smith [1].

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• Относительно более полного описания предмета см. Найквист [1]. - For a fuller treatment of this subject, see Nyquist [1].

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• Это составляет предмет физики. - This constitutes the subject matter of physics.

SUBJECT AREA: Agricultural and food technology

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The son of a Forfarshire tenant farmer, Patrick Bell obtained an MA from the University of St Andrews. His early association with farming kindled an interest in engineering and mechanics and he was to maintain a workshop not only on his father's farm, but also, in later life, at the parsonage at Carmyllie.

He was still studying divinity when he invented his reaping machine. Using garden shears as the basis of his design, he built a model in 1827 and a full-scale prototype the following year. Not wishing the machine to be seen during his early experiments, he and his brother planted a sheaf of oats in soil laid out in a shed, and first tried the machine on this. It cut well enough but left the straw in a mess behind it. A canvas belt system was devised and another secret trial in the barn was followed by a night excursion into a field, where corn was successfully harvested.

Two machines were at work during 1828, apparently achieving a harvest rate of one acre per hour. In 1832 there were ten machines at work, and at least another four had been sent to the United States by this time. Despite their success Bell did not patent his design, feeling that the idea should be given free to the world. In later years he was to regret the decision, feeling that the many badly-made imitations resulted in its poor reputation and prevented its adoption.

Bell's calling took precedence over his inventive interests and after qualifying he went to Canada in 1833, spending four years in Fergus, Ontario. He later returned to Scotland and be-came the minister at Carmyllie, with a living of £150 per annum.

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SUBJECT AREA: Metallurgy

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Soon after graduating from the Ecole des Mines at St-Etienne in 1910, Chevenard joined the Société de Commentry Fourchambault et Decazeville at their steelworks at Imphy, where he remained for the whole of his career. Imphy had for some years specialized in the production of nickel steels. From this venture emerged the first austenitic nickel-chromium steel, containing 6 per cent chromium and 22–4 per cent nickel and produced commercially in 1895. Most of the alloys required by Guillaume in his search for the low-expansion alloy Invar were made at Imphy. At the Imphy Research Laboratory, established in 1911, Chevenard conducted research into the development of specialized nickel-based alloys. His first success followed from an observation that some of the ferro-nickels were free from the low-temperature brittleness exhibited by conventional steels. To satisfy the technical requirements of Georges Claude, the French cryogenic pioneer, Chevenard was then able in 1912 to develop an alloy containing 55–60 per cent nickel, 1–3 per cent manganese and 0.2–0.4 per cent carbon. This was ductile down to −190°C, at which temperature carbon steel was very brittle.

By 1916 Elinvar, a nickel-iron-chromium alloy with an elastic modulus that did not vary appreciably with changes in ambient temperature, had been identified. This found extensive use in horology and instrument manufacture, and even for the production of high-quality tuning forks. Another very popular alloy was Platinite, which had the same coefficient of thermal expansion as platinum and soda glass. It was used in considerable quantities by incandescent-lamp manufacturers for lead-in wires. Other materials developed by Chevenard at this stage to satisfy the requirements of the electrical industry included resistance alloys, base-metal thermocouple combinations, magnetically soft high-permeability alloys, and nickel-aluminium permanent magnet steels of very high coercivity which greatly improved the power and reliability of car magnetos. Thermostatic bimetals of all varieties soon became an important branch of manufacture at Imphy.

During the remainder of his career at Imphy, Chevenard brilliantly elaborated the work on nickel-chromium-tungsten alloys to make stronger pressure vessels for the Haber and other chemical processes. Another famous alloy that he developed, ATV, contained 35 per cent nickel and 11 per cent chromium and was free from the problem of stress-induced cracking in steam that had hitherto inhibited the development of high-power steam turbines. Between 1912 and 1917, Chevenard recognized the harmful effects of traces of carbon on this type of alloy, and in the immediate postwar years he found efficient methods of scavenging the residual carbon by controlled additions of reactive metals. This led to the development of a range of stabilized austenitic stainless steels which were free from the problems of intercrystalline corrosion and weld decay that then caused so much difficulty to the manufacturers of chemical plant.

Chevenard soon concluded that only the nickel-chromium system could provide a satisfactory basis for the subsequent development of high-temperature alloys. The first published reference to the strengthening of such materials by additions of aluminium and/or titanium occurs in his UK patent of 1929. This strengthening approach was adopted in the later wartime development in Britain of the Nimonic series of alloys, all of which depended for their high-temperature strength upon the precipitated compound Ni3Al.

In 1936 he was studying the effect of what is now known as "thermal fatigue", which contributes to the eventual failure of both gas and steam turbines. He then published details of equipment for assessing the susceptibility of nickel-chromium alloys to this type of breakdown by a process of repeated quenching. Around this time he began to make systematic use of the thermo-gravimetrie balance for high-temperature oxidation studies.

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SUBJECT AREA: Chemical technology, Synthetic materials, Textiles

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Cross was educated at the universities of London, Zurich and Manchester. It was at Owens College, Manchester, that Cross first met E.J. Bevan and where these two first worked together on the nature of cellulose. After gaining some industrial experience, Cross joined Bevan to set up a partnership in London as analytical and consulting chemists, specializing in the chemistry and technology of cellulose and lignin. They were at the Jodrell laboratory, Kew Gardens, for a time and then set up their own laboratory at Station Avenue, Kew Gardens. In 1888, the first edition of their joint publication A Textbook of Paper-making, appeared. It went into several editions and became the standard reference and textbook on the subject. The long introductory chapter is a discourse on cellulose.

In 1892, Cross, Bevan and Clayton Beadle took out their historic patent on the solution and regeneration of cellulose. The modern artificial-fibre industry stems from this patent. They made their discovery at New Court, Carey Street, London: wood-pulp (or another cheap form of cellulose) was dissolved in a mixture of carbon disulphide and aqueous alkali to produce sodium xanthate. After maturing, it was squirted through fine holes into dilute acid, which set the liquid to give spinnable fibres of "viscose". However, it was many years before the process became a commercial operation, partly because the use of a natural raw material such as wood involved variations in chemical content and each batch might react differently. At first it was thought that viscose might be suitable for incandescent lamp filaments, and C.H.Stearn, a collaborator with Cross, continued to investigate this possibility, but the sheen on the fibres suggested that viscose might be made into artificial silk. The original Viscose Spinning Syndicate was formed in 1894 and a place was rented at Erith in Kent. However, it was not until some skeins of artificial silk (a term to which Cross himself objected) were displayed in Paris that textile manufacturers began to take an interest in it. It was then that Courtaulds decided to investigate this new fibre, although it was not until 1904 that they bought the English patents and developed the first artificial silk that was later called "rayon". Cross was also concerned with the development of viscose films and of cellulose acetate, which became a rival to rayon in the form of "Celanese". He retained his interest in the paper industry and in publishing, in 1895 again collaborating with Bevan and publishing a book on Cellulose and other technical articles. He was a cultured man and a good musician. He was elected a Fellow of the Royal Society in 1917.

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SUBJECT AREA: Textiles

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As a youth, Dyer constructed an unsinkable life-boat but did not immediately pursue his mechanical bent, for at 16 he entered the counting-house of a French refugee named Nancrède and succeeded to part of the business. He first went to England in 1801 and finally settled in 1811 when he married Ellen Jones (d. 1842) of Gower Street, London. Dyer was already linked with American inventors and brought to England Perkins's plan for steel engraving in 1809, shearing and nail-making machines in 1811, and also received plans and specifications for Fulton's steamboats. He seems to have acted as a sort of British patent agent for American inventors, and in 1811 took out a patent for carding engines and a card clothing machine. In 1813 there was a patent for spinning long-fibred substances such as hemp, flax or grasses, and in 1825 there was a further patent for card making machinery. Joshua Field, on his tour through Britain in 1821, saw a wire drawing machine and a leather splitting machine at Dyer's works as well as the card-making machines. At first Dyer lived in Camden Town, London, but he had a card clothing business in Birmingham. He moved to Manchester c.1816, where he developed an extensive engineering works under the name "Joseph C.Dyer, patent card manufacturers, 8 Stanley Street, Dale Street". In 1832 he founded another works at Gamaches, Somme, France, but this enterprise was closed in 1848 with heavy losses through the mismanagement of an agent. In 1825 Dyer improved on Danforth's roving frame and started to manufacture it. While it was still a comparatively crude machine when com-pared with later versions, it had the merit of turning out a large quantity of work and was very popular, realizing a large sum of money. He patented the machine that year and must have continued his interest in these machines as further patents followed in 1830 and 1835. In 1821 Dyer had been involved in the foundation of the Manchester Guardian (now The Guardian) and he was linked with the construction of the Liverpool \& Manchester Railway. He was not so successful with the ill-fated Bank of Manchester, of which he was a director and in which he lost £98,000. Dyer played an active role in the community and presented many papers to the Manchester Literary and Philosophical Society. He helped to establish the Royal Institution in London and the Mechanics Institution in Manchester. In 1830 he was a member of the delegation to Paris to take contributions from the town of Manchester for the relief of those wounded in the July revolution and to congratulate Louis-Philippe on his accession. He called for the reform of Parliament and helped to form the Anti-Corn Law League. He hated slavery and wrote several articles on the subject, both prior to and during the American Civil War.

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See also: Arnold, Aza

SUBJECT AREA: Horology

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Huygens was born into a cultured and privileged class. His father, Constantijn, was a poet and statesman who had wide interests. Constantijn exerted a strong influence on his son, who was educated at home until he reached the age of 16. Christiaan studied law and mathematics at Ley den University from 1645 to 1647, and continued his studies at the Collegium Arausiacum in Breda until 1649. He then lived at The Hague, where he had the means to devote his time entirely to study. In 1666 he became a Member of the Académie des Sciences in Paris and settled there until his return to The Hague in 1681. He also had a close relationship with the Royal Society and visited London on three occasions, meeting Newton on his last visit in 1689. Huygens had a wide range of interests and made significant contributions in mathematics, astronomy, optics and mechanics. He also made technical advances in optical instruments and horology.

Despite the efforts of Burgi there had been no significant improvement in the performance of ordinary clocks and watches from their inception to Huygens's time, as they were controlled by foliots or balances which had no natural period of oscillation. The pendulum appeared to offer a means of improvement as it had a natural period of oscillation that was almost independent of amplitude. Galileo Galilei had already pioneered the use of a freely suspended pendulum for timing events, but it was by no means obvious how it could be kept swinging and used to control a clock. Towards the end of his life Galileo described such a. mechanism to his son Vincenzio, who constructed a model after his father's death, although it was not completed when he himself died in 1642. This model appears to have been copied in Italy, but it had little influence on horology, partly because of the circumstances in which it was produced and possibly also because it differed radically from clocks of that period. The crucial event occurred on Christmas Day 1656 when Huygens, quite independently, succeeded in adapting an existing spring-driven table clock so that it was not only controlled by a pendulum but also kept it swinging. In the following year he was granted a privilege or patent for this clock, and several were made by the clockmaker Salomon Coster of The Hague. The use of the pendulum produced a dramatic improvement in timekeeping, reducing the daily error from minutes to seconds, but Huygens was aware that the pendulum was not truly isochronous. This error was magnified by the use of the existing verge escapement, which made the pendulum swing through a large arc. He overcame this defect very elegantly by fitting cheeks at the pendulum suspension point, progressively reducing the effective length of the pendulum as the amplitude increased. Initially the cheeks were shaped empirically, but he was later able to show that they should have a cycloidal shape. The cheeks were not adopted universally because they introduced other defects, and the problem was eventually solved more prosaically by way of new escapements which reduced the swing of the pendulum. Huygens's clocks had another innovatory feature: maintaining power, which kept the clock going while it was being wound.

Pendulums could not be used for portable timepieces, which continued to use balances despite their deficiencies. Robert Hooke was probably the first to apply a spring to the balance, but his efforts were not successful. From his work on the pendulum Huygens was well aware of the conditions necessary for isochronism in a vibrating system, and in January 1675, with a flash of inspiration, he realized that this could be achieved by controlling the oscillations of the balance with a spiral spring, an arrangement that is still used in mechanical watches. The first model was made for Huygens in Paris by the clockmaker Isaac Thuret, who attempted to appropriate the invention and patent it himself. Huygens had for many years been trying unsuccessfully to adapt the pendulum clock for use at sea (in order to determine longitude), and he hoped that a balance-spring timekeeper might be better suited for this purpose. However, he was disillusioned as its timekeeping proved to be much more susceptible to changes in temperature than that of the pendulum clock.

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SUBJECT AREA: Photography, film and optics, Telecommunications

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Steinheil studied under Gauss at Göttingen and Bessel at Königsberg before jointing his parents at Munich. There he concentrated on optics before being appointed Professor of Physics and Mathematics at the University of Munich in 1832. Immediately after the announcement of the first practicable photographic processes in 1839, he began experiments on photography in association with another professor at the University, Franz von Kobell. Steinheil is reputed to have made the first daguerreotypes in Germany; he certainly constructed several cameras of original design and suggested minor improvements to the daguerreotype process. In 1849 he was employed by the Austrian Government as Head of the Department of Telegraphy in the Ministry of Commerce. Electromagnetic telegraphy was an area in which Steinheil had worked for several years previously, and he was now appointed to supervise the installation of a working telegraphic system for the Austrian monarchy. He is considered to be the founder of electromagnetic telegraphy in Austria and went on to perform a similar role in Switzerland.

Steinheil's son, Hugo Adolph, was educated in Munich and Augsburg but moved to Austria to be with his parents in 1850. Adolph completed his studies in Vienna and was appointed to the Telegraph Department, headed by his father, in 1851. Adolph returned to Munich in 1852, however, to concentrate on the study of optics. In 1855 the father and son established the optical workshop which was later to become the distinguished lens-manufacturing company C.A. Steinheil Söhne. At first the business confined itself almost entirely to astronomical optics, but in 1865 the two men took out a joint patent for a wide-angle photographic lens claimed to be free of distortion. The lens, called the "periscopic", was not in fact free from flare and not achromatic, although it enjoyed some reputation at the time. Much more important was the achromatic development of this lens that was introduced in 1866 and called the "Aplanet"; almost simultaneously a similar lens, the "Rapid Rentilinear", was introduced by Dallmeyer in England, and for many years lenses of this type were fitted as the standard objective on most photographic cameras. During 1866 the elder Steinheil relinquished his interest in lens manufacturing, and control of the business passed to Adolph, with administrative and financial affairs being looked after by another son, Edward. After Carl Steinheil's death Adolph continued to design and market a series of high-quality photographic lenses until his own death.

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SUBJECT AREA: Aerospace

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Gabriel Voisin was one of a group of aviation pioneers working in France c. 1905. One of the leaders of this group was a rich lawyer-sportsman, Ernest Archdeacon. For a number of years they had been building gliders based on those of the Wright brothers. Archdeacon's glider of 1904 was flown by Voisin, who went on to assist in the design and manufacture of gliders for Archdeacon and Louis Blériot, including successful float-gliders. Gabriel Voisin was joined by his brother Charles in 1905 and they set up the first commercial aircraft factory. As the Voisins had limited funds, they had to seek customers who could afford to indulge in the fashionable hobby of flying. One was Santos- Dumont, who commissioned Voisin to build his "14 bis" aeroplane in 1906.

Early in 1907 the Voisins built their first powered aeroplane, but it was not a success.

Later that year they completed a biplane for a Paris sculptor, Léon Delagrange, and another for Henri Farman. The basic Voisin was a biplane with the engine behind the pilot and a "pusher" propeller. Pitching was controlled by biplane elevators forward of the pilot and rudders were fitted to the box kite tail, but there was no control of roll.

Improvements were gradually introduced by the Voisins and their customers, such as Farman. Incidentally, to flatter their clients the Voisins often named the aircraft after them, thus causing some confusion to historians. Many Voisins were built up until 1910, when the company's fortunes sank. Competition was growing, the factory was flooded, and Charles left. Gabriel started again, building robust biplanes of steel construction. Voisin bombers were widely used during the First World War, and a subsidiary factory was built in Russia.

In August 1917, Voisin sold his business when the French Air Ministry decided that Voisin aeroplanes were obsolete and that the factory should be turned over to the building of engines. After the war he started another business making prefabricated houses, and then turned to manufacturing motor cars. From 1919 to 1939 his company produced various models, mainly for the luxury end of the market but also including a few sports and racing cars. In the early 1950s he designed a small two-seater, which was built by the Biscuter company in Spain. The Voisin company finally closed in 1958.

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SUBJECT AREA: Photography, film and optics

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Galileo began studying medicine at the University of Pisa but soon turned to his real interests, mathematics, mechanics and astronomy. He became Professor of Mathematics at Pisa at the age of 25 and three years later moved to Padua. In 1610 he transferred to Florence. While still a student he discovered the isochronous property of the pendulum, probably by timing with his pulse the swings of a hanging lamp during a religious ceremony in Pisa Cathedral. He later designed a pendulum-controlled clock, but it was not constructed until after his death, and then not successfully; the first successful pendulum clock was made by the Dutch scientist Christiaan Huygens in 1656. Around 1590 Galileo established the laws of motion of falling bodies, by timing rolling balls down inclined planes and not, as was once widely believed, by dropping different weights from the Leaning Tower of Pisa. These and other observations received definitive treatment in his Discorsi e dimostrazioni matematiche intorno a due nuove scienzi attenenti alla, meccanica (Dialogues Concerning Two New Sciences…) which was completed in 1634 and first printed in 1638. This work also included Galileo's proof that the path of a projectile was a parabola and, most importantly, the development of the concept of inertia.

In astronomy Galileo adopted the Copernican heliocentric theory of the universe while still in his twenties, but he lacked the evidence to promote it publicly. That evidence came with the invention of the telescope by the Dutch brothers Lippershey. Galileo heard of its invention in 1609 and had his own instrument constructed, with a convex object lens and concave eyepiece, a form which came to be known as the Galilean telescope. Galileo was the first to exploit the telescope successfully with a series of striking astronomical discoveries. He was also the first to publish the results of observations with the telescope, in his Sidereus nuncius (Starry Messenger) of 1610. All the discoveries told against the traditional view of the universe inherited from the ancient Greeks, and one in particular, that of the four satellites in orbit around Jupiter, supported the Copernican theory in that it showed that there could be another centre of motion in the universe besides the Earth: if Jupiter, why not the Sun? Galileo now felt confident enough to advocate the theory, but the advance of new ideas was opposed, not for the first or last time, by established opinion, personified in Galileo's time by the ecclesiastical authorities in Rome. Eventually he was forced to renounce the Copernican theory, at least in public, and turn to less contentious subjects such as the "two new sciences" of his last and most important work.

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SUBJECT AREA: Architecture and building, Paper and printing

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Perkins's occupation was that of a gold-and silversmith; while he does not seem to have followed this after 1800, however, it gave him the skills in working metals which he would continue to employ in his inventions. He had been working in America for four years before he patented his nail-making machine in 1796. At the time there was a great shortage of nails because only hand-forged ones were available. By 1800, other people had followed his example and produced automatic nail-making machines, but in 1811 Perkins' improved machines were introduced to England by J.C. Dyer. Eventually Perkins had twenty-one American patents for a range of inventions in his name.

In 1799 Perkins invented a system of engraving steel plates for printing banknotes, which became the foundation of modern siderographic work. It discouraged forging and was adopted by many banking houses, including the Federal Government when the Second United States Bank was inaugurated in 1816. This led Perkins to move to Philadelphia. In the intervening years, Perkins had improved his nail-making machine, invented a machine for graining morocco leather in 1809, a fire-engine in 1812, a letter-lock for bank vaults and improved methods of rolling out spoons in 1813, and improved armament and equipment for naval ships from 1812 to 1815.

It was in Philadelphia that Perkins became interested in the steam engine, when he met Oliver Evans, who had pioneered the use of high-pressure steam. He became a member of the American Philosophical Society and conducted experiments on the compressibility of water before a committee of that society. Perkins claimed to have liquified air during his experiments in 1822 and, if so, was the real discoverer of the liquification of gases. In 1819 he came to England to demonstrate his forgery-proof system of printing banknotes, but the Bank of England was the only one which did not adopt his system.

While in London, Perkins began to experiment with the highest steam pressures used up to that time and in 1822 took out his first of nineteen British patents. This was followed by another in 1823 for a 10 hp (7.5 kW) engine with only 2 in. (51 mm) bore, 12 in. (305 mm) stroke but a pressure of 500 psi (35 kg/cm²), for which he claimed exceptional economy. After 1826, Perkins abandoned his drum boiler for iron tubes and steam pressures of 1,500 psi (105 kg/cm²), but the materials would not withstand such pressures or temperatures for long. It was in that same year that he patented a form of uniflow cylinder that was later taken up by L.J. Todd. One of his engines ran for five days, continuously pumping water at St Katherine's docks, but Perkins could not raise more finance to continue his experiments.

In 1823 one his high-pressure hot-water systems was installed to heat the Duke of Wellington's house at Stratfield Saye and it acquired a considerable vogue, being used by Sir John Soane, among others. In 1834 Perkins patented a compression ice-making apparatus, but it did not succeed commercially because ice was imported more cheaply from Norway as ballast for sailing ships. Perkins was often dubbed "the American inventor" because his inquisitive personality allied to his inventive ingenuity enabled him to solve so many mechanical challenges.

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SUBJECT AREA: Paper and printing

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Koenig became a printer and bookseller. Around 1800 he was among those who conceived the idea of mechanizing the hand printing press, which apart from minor details had survived virtually unchanged through the first three and a half centuries of printing. In 1803, in Sühl, Saxony, he designed a press in which the flat forme, carrying the type, was mechanically inked and passed to and from the platen. Whether this ma-chine was ever constructed is not known, but Koenig found little support for his ideas because of lack of technical and financial resources. So, in 1806, he went to England and was introduced to Thomas Bensley, a book printer off Fleet Street in London. Bensley agreed to support Koenig and brought in two other printers to help finance Koenig's experiments. Another German, Andreas Bauer, an engineer, assisted Koenig and became largely responsible for the practical execution of Koenig's plans.

In 1810 they patented a press which was steam-driven but still used a platen. It was set to work in Bensley's office the following year but did not prove to be satisfactory. Koenig redesigned it, and in October 1811 he obtained a patent for a steam-driven press on an entirely new principle. In place of the platen, the paper was fixed around a hollow rotating cylinder, which impressed the paper on to the inked forme. In Bensley's office it was used for book printing, but its increased speed over the hand press appealed to newspaper proprietors and John Walter II of The Times asked Koenig to make a double-cylinder machine, so that the return stroke of the forme would be productive. A further patent was taken out in 1813 and the new machine was made ready to print the 29 November 1814 issue—in secrecy, behind closed doors, to forestall opposition from the pressmen working the hand presses. An important feature of the machine was that the inking rollers were not of the traditional leather or skin but a composite material made from glue, molasses and some soda. The inking could not have been achieved satisfactorily with the old materials. The editorial of that historic issue proclaimed, 'Our Journal of this day presents to the public the practical result of the greatest improvement connected with printing, since the discovery of the art itself Koenig's machine press could make 1,200 impressions an hour compared to 200 with the hand press; further improvements raised this figure to 1,500–2,000. Koenig's last English patent was in 1814 for an improved cylinder machine and a perfecting machine, which printed both sides of the paper. The steam-driven perfecting press was printing books in Bensley's office in February 1816. Koenig and Bauer wanted by that time to manufacture machine presses for other customers, but Bensley, now the principal shareholder, insisted that they should make machines for his benefit only. Finding this restriction intolerable, Koenig and Bauer returned to Germany: they became partners in a factory at Oberzell, near Würzburg, in 1817 and the firm of Koenig and Bauer flourishes there to this day.

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SUBJECT AREA: Agricultural and food technology, Automotive engineering, Land transport

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The credit for the first design of sheep shears lies with James Higham, who patented the idea in 1868. However, its practical and commercial success lay in the work of a number of people, to each of whom Frederick Wolseley provides the connecting link.

One of three brothers, he emigrated to Australia in 1854 and worked in New South Wales for five years. In 1867 he produced a working model of mechanical sheep shears, but it took a further five years before he actually produced a machine, whilst working as Manager of a sheep station in Victoria. In the intervening period it is possible that he visited America and Britain. On returning to Australia in 1872 he and Robert Savage produced another working model in a workshop in Melbourne. Four years later, by which time Wolseley had acquired the "Euroka" sheep station at Walgett, they tested the model and in 1877 acquired joint patent rights. The machine was not successful, and in 1884 another joint patent, this time with Robert Pickup, was taken out on a cog-gear universal joint. Development was to take several more years, during which a highly skilled blacksmith by the name of George Gray joined the team. It is likely that he was the first person to remove a fleece from a sheep mechanically. Finally, the last to be involved in the development of the shears was another Englishman, John Howard, who emigrated to Australia in 1883 with the intention of developing a shearing machine based on his knowledge of existing horse clippers. Wolseley purchased Howard's patent rights and gave him a job. The first public demonstration of the shears was held at the wool stores of Goldsborough \& Co. of Melbourne. Although the hand shearers were faster, when the three sheep that had been clipped by them were re-shorn using the mechanical machine, a further 2 lb (900 g) of wool was removed.

Wolseley placed the first manufacturing order with A.P.Parks, who employed a young Englishman by the name of Herbert Austin. A number of improvements to the design were suggested by Austin, who acquired patents and assigned them to Wolseley in 1895 in return for shares in the company. Austin returned to England to run the Wolseley factory in Birmingham. He also built there the first car to carry the Wolseley name, and subsequently opened a car factory carrying his own name.

Wolseley resigned as Managing Director of the company in 1894 and died five years later.

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SUBJECT AREA: Textiles

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Arkwright was the youngest of thirteen children and was apprenticed to a barber; when he was about 18, he followed this trade in Bol ton. In 1755 he married Patients Holt, who bore him a son before she died, and he remarried in 1761, to Margaret Biggins. He prospered until he took a public house as well as his barber shop and began to lose money. After this failure, he travelled around buying women's hair for wigs.

In the late 1760s he began spinning experiments at Preston. It is not clear how much Arkwright copied earlier inventions or was helped by Thomas Highs and John Kay but in 1768 he left Preston for Nottingham, where, with John Smalley and David Thornley as partners, he took out his first patent. They set up a mill worked by a horse where machine-spun yarn was produced successfully. The essential part of this process lay in drawing out the cotton by rollers before it was twisted by a flyer and wound onto the bobbin. The partners' resources were not sufficient for developing their patent so Arkwright found new partners in Samuel Need and Jedediah Strutt, hosiers of Nottingham and Derby. Much experiment was necessary before they produced satisfactory yarn, and in 1771 a water-driven mill was built at Cromford, where the spinning process was perfected (hence the name "waterframe" was given to his spinning machine); some of this first yarn was used in the hosiery trade. Sales of all-cotton cloth were initially limited because of the high tax on calicoes, but the tax was lowered in 1774 by Act of Parliament, marking the beginning of the phenomenal growth of the cotton industry. In the evidence for this Act, Arkwright claimed that he had spent £12,000 on his machine. Once Arkwright had solved the problem of mechanical spinning, a bottleneck in the preliminary stages would have formed but for another patent taken out in 1775. This covered all preparatory processing, including some ideas not invented by Arkwright, with the result that it was disputed in 1783 and finally annulled in 1785. It contained the "crank and comb" for removing the cotton web off carding engines which was developed at Cromford and solved the difficulty in carding. By this patent, Arkwright had mechanized all the preparatory and spinning processes, and he began to establish water-powered cotton mills even as far away as Scotland. His success encouraged many others to copy him, so he had great difficulty in enforcing his patent Need died in 1781 and the partnership with Strutt ended soon after. Arkwright became very rich and financed other spinning ventures beyond his immediate control, such as that with Samuel Oldknow. It was estimated that 30,000 people were employed in 1785 in establishments using Arkwright's patents. In 1786 he received a knighthood for delivering an address of thanks when an attempt to assassinate George III failed, and the following year he became High Sheriff of Derbyshire. He purchased the manor of Cromford, where he died in 1792.

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