See also:SIR See also:JOSEPH See also:- WILSON, ALEXANDER (1766-1813)
- WILSON, HENRY (1812–1875)
- WILSON, HORACE HAYMAN (1786–1860)
- WILSON, JAMES (1742—1798)
- WILSON, JAMES (1835— )
- WILSON, JAMES HARRISON (1837– )
- WILSON, JOHN (1627-1696)
- WILSON, JOHN (178 1854)
- WILSON, ROBERT (d. 1600)
- WILSON, SIR DANIEL (1816–1892)
- WILSON, SIR ROBERT THOMAS (1777—1849)
- WILSON, SIR WILLIAM JAMES ERASMUS
- WILSON, THOMAS (1663-1755)
- WILSON, THOMAS (c. 1525-1581)
- WILSON, WOODROW (1856— )
WILSON See also:SWAN (1828– )
, See also:English physicist and electrician, was See also:born at See also:Sunderland on the 31st of See also:October 1828
.
After serving his See also:apprenticeship with a chemist in his native See also:town, he became first assistant and later partner in a See also:firm of manufacturing chemists in See also:Newcastle
.
Among its operations this firm included the manufacture of photographic plates, and thus See also:Swan was led to one of the advances in See also:photography with which his name is associated—the See also:production of extremely rapid dry plates, which were the outcome of an See also:original observation made by him on the effect of See also:heat in increasing the sensitiveness of a gelatino-bromide of See also:silver emulsion
.
In 1862 he patented the first commercially practicable See also:process for See also:carbon See also:printing in photography
.
This depended on the fact that when gelatine is exposed to See also:light in the presence of bichromate salts it is rendered insoluble and non-absorbent of See also:water
.
Swan took a See also:surface of gelatine, dusted over with lampblack and sensitized with bichromate of ammonium, and exposed it to light below a photographic negative; the result was to make the gelatine from the surface downwards insoluble to a See also:depth depending on the intensity, and therefore- penetration, of the light which had reached it through the negative
.
In this operation the surface of the gelatine was also rendered insoluble, and it therefore became necessary to get at its back in See also:- ORDER
- ORDER (through Fr. ordre, for earlier ordene, from Lat. ordo, ordinis, rank, service, arrangement; the ultimate source is generally taken to be the root seen in Lat. oriri, rise, arise, begin; cf. " origin ")
- ORDER, HOLY
order to be able to See also:wash away the portions that still remained soluble; this was effected by cementing the insoluble surface to a fresh See also:sheet of See also:paper by means of indiarubber See also:solution, and then detaching the original support
.
It thus became possible to reach the soluble portions with water and to obtain a See also:representation of the picture, though reversed as to right and See also:left, in See also:relief on the pigmented gelatine
.
This process has been simplified and improved by subsequent workers, but in its essential features it forms the basis of some of the methods of photographic See also:reproduction most widely used at the See also:present See also:day
.
But Swan's name deserves remembrance even more in connexion with the invention of the incandescent electric See also:lamp than with improvements in photographic technique
.
He was one of the first to undertake the production of an electric lamp in which the light should be produced by the passage of an electric current through a carbon filament, and he was almost certainly far ahead, in point of See also:- TIME (0. Eng. Lima, cf. Icel. timi, Swed. timme, hour, Dan. time; from the root also seen in " tide," properly the time of between the flow and ebb of the sea, cf. O. Eng. getidan, to happen, " even-tide," &c.; it is not directly related to Lat. tempus)
- TIME, MEASUREMENT OF
- TIME, STANDARD
time, of any other worker in the same See also:- FIELD (a word common to many West German languages, cf. Ger. Feld, Dutch veld, possibly cognate with O.E. f olde, the earth, and ultimately with root of the Gr. irAaror, broad)
- FIELD, CYRUS WEST (1819-1892)
- FIELD, DAVID DUDLEY (18o5-1894)
- FIELD, EUGENE (1850-1895)
- FIELD, FREDERICK (18o1—1885)
- FIELD, HENRY MARTYN (1822-1907)
- FIELD, JOHN (1782—1837)
- FIELD, MARSHALL (183 1906)
- FIELD, NATHAN (1587—1633)
- FIELD, STEPHEN JOHNSON (1816-1899)
- FIELD, WILLIAM VENTRIS FIELD, BARON (1813-1907)
field in realizing the conditions to be met and the difficulties to be overcome
.
So far back as 186o he constructed an electric lamp with a carbon filament, which was formed by, packing pieces of paper or card with See also:charcoal See also:powder in a crucible and subjecting the whole to a high temperature
.
The carbonized paper thus obtained he mounted in the See also:form of a See also:fine See also:strip in a vacuous See also:glass See also:vessel and connected it with a See also:battery of See also:Grove's cells, which though not strong enough to raise it to See also:complete incandescence, were sufficient to make it red-het
.
This was substantially the method adopted by See also:Edison nearly twenty years later, after various fruitless efforts to make a See also:practical lamp with a filament of See also:platinum or a platinum alloy had convinced him of the unsuitability of that See also:- METAL
- METAL (through Fr. from Lat. metallum, mine, quarry, adapted from Gr. µATaXAov, in the same sense, probably connected with ,ueraAAdv, to search after, explore, µeTa, after, aAAos, other)
metal for the purpose—a conclusion which Swan had reasoned out for himself many years before
.
By the time Edison had See also:hit upon the See also:idea of carbonizing paper or See also:bamboo by heat to form the filament, Swan had devised the further improvement of using See also:cotton See also:- THREAD (0. Eng. praed, literally, that which is twisted, prawan, to twist, to throw, cf. " throwster," a silk-winder, Ger. drehen, to twist, turn, Du. draad, Ger. Draht, thread, wire)
thread " parchmentized " by the See also:action of sulphuric See also:acid, and it was by the aid of such carbon filaments that on the 2oth of October 188o he gave at Newcastle the first public See also:exhibition
and literature
.
Scientifically it is usually known as See also:Cygnus olor
.
Its large See also:size, its spotless See also:- WHITE
- WHITE, ANDREW DICKSON (1832– )
- WHITE, GILBERT (1720–1793)
- WHITE, HENRY KIRKE (1785-1806)
- WHITE, HUGH LAWSON (1773-1840)
- WHITE, JOSEPH BLANCO (1775-1841)
- WHITE, RICHARD GRANT (1822-1885)
- WHITE, ROBERT (1645-1704)
- WHITE, SIR GEORGE STUART (1835– )
- WHITE, SIR THOMAS (1492-1567)
- WHITE, SIR WILLIAM ARTHUR (1824--1891)
- WHITE, SIR WILLIAM HENRY (1845– )
- WHITE, THOMAS (1628-1698)
- WHITE, THOMAS (c. 1550-1624)
white plumage, its See also:orange-red See also:bill, surmounted by a See also:black knob (technically the "See also:berry ") larger in the male than in the See also:female, its black legs and stately See also:appearance on the water are See also:familiar, either from figures innumerable or from See also:direct observation, to almost every one
.
When left to itself its See also:nest is a large See also:mass of aquatic See also:plants, often piled to the height of a couple of feet and possibly some six feet in See also:diameter
.
In the midst of this is a hollow which contains the eggs, generally from five to nine in number, of a greyish-See also:olive See also:colour
.
The See also:period of See also:incubation is between five and six See also:weeks, and the See also:young when hatched are clothed in sooty-See also:grey down, which is succeeded by feathers of sooty-See also:- BROWN
- BROWN, CHARLES BROCKDEN (1771-181o)
- BROWN, FORD MADOX (1821-1893)
- BROWN, FRANCIS (1849- )
- BROWN, GEORGE (1818-188o)
- BROWN, HENRY KIRKE (1814-1886)
- BROWN, JACOB (1775–1828)
- BROWN, JOHN (1715–1766)
- BROWN, JOHN (1722-1787)
- BROWN, JOHN (1735–1788)
- BROWN, JOHN (1784–1858)
- BROWN, JOHN (1800-1859)
- BROWN, JOHN (1810—1882)
- BROWN, JOHN GEORGE (1831— )
- BROWN, ROBERT (1773-1858)
- BROWN, SAMUEL MORISON (1817—1856)
- BROWN, SIR GEORGE (1790-1865)
- BROWN, SIR JOHN (1816-1896)
- BROWN, SIR WILLIAM, BART
- BROWN, THOMAS (1663-1704)
- BROWN, THOMAS (1778-1820)
- BROWN, THOMAS EDWARD (1830-1897)
- BROWN, WILLIAM LAURENCE (1755–1830)
brown
.
This suit is gradually replaced by white, but the young birds are more than a twelve-See also:month old before they lose all trace of colouring and become wholly white
.
It was, however, noticed by See also:Plot (N.H
.
See also:Staffordshire, p
.
228) more than 20o years ago that certain swans on the See also:Trent had white cygnets; and it was subsequently observed of such birds that both parents and progeny had legs of a paler colour, while the young had not the " See also:blue bill " of See also:ordinary swans at the same See also:age that has in some parts of the See also:country given them a name, besides offering a few other See also:minor See also:differences
.
These, being examined by W
.
See also:Yarrell led him to announce (Proc
.
Zool
.
Society, 1838, p
.
19) the birds presenting them as forming a distinct See also:species, C. immutabilis, to which the English name of " See also:Polish " swan had already been attached by the See also:London poulterers,) but which is now regarded merely as a variety, not in any way specially associated with See also:Poland but possibly a dimorphic form
.
The whooper, whistling or See also:wild swan2 of See also:modern usage, Cygnus musicus, which was doubtless always a See also:winter-visitant to See also:Britain, though nearly as bulky and quite as purely white in its adult plumage, is at once recognizable from the species which has been See also:half domesticated by its wholly different but equally graceful See also:carriage, and its bill—which is black at the tip and See also:lemon-yellow for a See also:great See also:part of its See also:base
.
This entirely distinct species is a native of See also:Iceland, eastern See also:Lapland and See also:northern See also:Russia, whence it wanders southward in autumn, and the musical tones it utters (contrasting with the silence that has caused its relative to be often called the See also:mute swan) have been celebrated from the time of See also:Homer to our own
.
Otherwise in a See also:general way there is little difference between the habits of the two, and very closely allied to the whooper is a much smaller species, with very well marked characteristics, known as See also:Bewick's Swan, C. bewicki
.
This was first indicated as a variety of the last by P
.
S
.
See also:Pallas, but its specific validity is now fully established
.
Apart from size, it may be externally distinguished from the whooper by the bill having only a small patch of yellow, which inclines to an orange rather than a lemon tint; while internally the difference of the vocal See also:organs is well marked, and its cry, though melodious enough, is unlike
.
It has a more easterly See also:home in the See also:north than the whooper, but in winter not infrequently occurs in Britain
.
Both the species last mentioned have their representatives in North See also:America, and in each See also:case the transatlantic See also:bird is considerably larger than that of the Old See also:World
.
The first is the See also:trumpeter-swan, C. buccinator, which has the bill wholly black, and the second the C. columbianus—greatly resembling Bewick's swan, but with the coloured patches on the bill of less extent and deepening almost into See also:scarlet
.
See also:South America produces two very distinct birds commonly regarded as swans, Cygnus melanocoryphus, the black-necked swan, and that which is called Coscoroba
.
This last, C. candida, which inhabits the See also:southern extremity of the See also:continent to See also:Chile and the See also:Argentine territory and visits the See also:Falkland Islands, is the smallest species known—pure white in colour except the tip of its primaries, but having a red bill and red feet.3 The former, if not discovered by earlier navigators, was
M
.
Gerbe, in his edition of Degland's Ornithologie Europeenne (ii
.
477), makes the amusing See also:mistake of attributing this name to the fourreurs (furriers) of London, and of See also:reading it Cygne du See also:pole (polar, and not Polish, swan)
!
2 In some districts it is called by wild-fowlers " See also:elk," which perhaps may be cognate with the Icelandic Alit and the Old See also:German Elbs or Elps (cf
.
See also:Gesner, Ornithologia, pp
.
358, 359), though by modern Germans Etb-schwan seems to be used for the preceding species
.
3 Dr Stejneger (Proc
.
U
.
S
.
Nat
.
Museum, 1882, pp
.
177–179) has been at much pains to show that this is no swan at all, but merely a large Anatine form
.
Further See also:research may prove that his views are well founded, and that this, with another very imperfectly known species, C. davidi, described by Swinhoe (Proc
.
Zool
.
See also:Soc.,observed by Narbrough on the 2nd of See also:August 1670 in the Strait of See also:Magellan, as announced in 1694 in the first edition of his Voyage (p
.
52)
.
It was subsequently found on the Falkland Islands during the See also:French See also:settlement there in 1764–1765, as stated by Pernetty (Voyage, 2nd ed., ii
.
26, 99), and was first technically described in 1782 by See also:Molina (Saggio See also:sulla See also:star. nat. del Chile, pp
.
234, 344)
.
Its range seems to be much the same as that of the Coscoroba, except that it comes farther to the northward, to the See also:coast of southern See also:Brazil on the See also:east, and perhaps into See also:Bolivia on the See also:west
.
It is a very handsome bird, of large size, with a See also:bright red nasal knob, a black See also:neck and the See also:rest of its plumage pure white
.
It has been introduced into See also:Europe, and breeds freely in confinement
.
A greater See also:interest than attaches to the South See also:American birds last mentioned is that which invests the black swan of See also:Australia, Chenopis atrata
.
Considered for so many centuries to be an impossibility, the knowledge of its existence seems to have impressed (more perhaps than anything else) the popular mind with the notion of the extreme divergence—not to say the contrariety—of the organic products of that country
.
By a singular stroke of See also:fortune we are able to name the precise day on which this unexpected See also:discovery was made
.
The Dutch navigator Willem de Vlaming, visiting the west coast of Zuidland (Southland), sent two of his boats on the 6th of See also:January 1697 to explore an See also:estuary he had found
.
There their crews saw at first two and then more black swans, of which they caught four, taking two of them alive to See also:Batavia; and Valentyn, who several years later recounted this voyage, gives in his See also:work' a See also:plate representing the See also:ship, boats and birds, at the mouth of what is now known from this circumstance as Swan See also:river, the most important stream of the thriving See also:colony of West Australia, which has adopted this very bird as its armorial See also:symbol
.
Valentyn, however, was not the first to publish this interesting discovery
.
See also:News of it soon reached See also:Amsterdam, and the burgomaster of that See also:city, Witsen by name, himself a See also:fellow of the Royal Society, lost no time in communicating the See also:chief facts ascertained, and among them the finding of the black swans, to See also:- MARTIN (Martinus)
- MARTIN, BON LOUIS HENRI (1810-1883)
- MARTIN, CLAUD (1735-1800)
- MARTIN, FRANCOIS XAVIER (1762-1846)
- MARTIN, HOMER DODGE (1836-1897)
- MARTIN, JOHN (1789-1854)
- MARTIN, LUTHER (1748-1826)
- MARTIN, SIR THEODORE (1816-1909)
- MARTIN, SIR WILLIAM FANSHAWE (1801–1895)
- MARTIN, ST (c. 316-400)
- MARTIN, WILLIAM (1767-1810)
Martin See also:Lister, by whom they were laid before that society in October 1698, and printed in its Philosophical Transactions, xx
.
361
.
Subsequent voyagers, See also:Cook and others, found that the range of the species extended over the greater part of Australia, in many districts of which it was abundant
.
It has since rapidly decreased in See also:numbers, but is not likely soon to cease to exist as a wild bird, while its singular and ornamental appearance will probably preserve it as a modified See also:captive in most civilized countries
.
The species scarcely needs description: the sooty black of its general plumage is relieved by the snowy white of its See also:flight-feathers and its See also:coral-like bill banded with See also:ivory
.
The Cygninae admittedly form a well-defined See also:group of the See also:family Anatidae, and there is now no doubt as to its limits, except in the case of the Coscoroba above mentioned
.
This bird would seem to be, as is so often found in members of the South American See also:fauna, a more generalized form, presenting several characteristics of the Anatinac, while the rest, even its black-necked compatriot and the almost wholly black swan of Australia, have a higher morphological See also:rank
.
Excluding from See also:consideration the little-known C. davidi, of the five or six species of the northern hemisphere four present the curious See also:character, somewhat analogous to that found in certain See also:cranes (q.v.), of the penetration of the sternum by the trachea nearly to the posterior end of the See also:keel, whence it returns forward and upward again to revert and enter the lungs; but in the two larger of these species, when adult, the See also:loop of the trachea between the walls of the keel takes a See also:vertical direction, while in the two smaller the See also:bend is See also:horizontal, thus affording an easy mode of recognizing the respective species of each
.
Fossil remains of more than one species of swan have been found
.
The most remarkable is C. fatconeri, which was nearly a third larger than the mute swan, and was described from a Maltese See also:cave by W
.
K
.
See also:Parker in the Zoological Society's Transactions, vi
.
119-124, pl
.
30
.
(A
.
End of Article: