786 HENRY SOTHERAN & CO., 140, STRAND, W.C, and 43, PICCADILLY, W. 



15599 WINKLER (Joliaan Heinrich; Univ. Leipzig) Elements of Natural Philosophy 

 Delineated, translated from the 2nd German Edition, as enlarged by the Author, with 14 plates, 

 ■2 vols. 8vo. tree-calf, newly rebacked (scarce), 12s 6d 1757 



15600 Die Eigenschaften der electrischen Materie und des electrischen Feuers, aus 



verschiedenen neuen Versuchen erklaret, und nebst etlichen NEUEN Maschinen zum Electrisiren ; 

 with 4 plates, sm. Svo. sewn (rare), 17* 6d Leipzig, 1745 



This work contains a description of the author's electrical machines, in which for the first time a leathern cushion is 

 used, which is pressed ajrainst the glass globes by a spring. 



15601 GEDANKENvonden Eigenschaften, WiRKUNGEN und Ursachen von der Electricitat, 



nebst einer Beschreibung zwo Neuer electrischen Maschinen; with 3 plates, sm. Svo. seion, 

 or, boards (rare), I2s ibidem, 17 i4 



Containing experiments in which the author first showed that the electric spark ignites alcohol, etc. 



Essai sur la Nature, les Effets, et les Causes de I'Electricite (1748)— y. No. 12736 



ante. 



15602 Die Starke der electrischen Kraft des Wassers in glasernen Gefassen, welehe 



durcli den Mussclienbrokischen [sic] Versuch bekannt geworden ; with '2 plates, Svo. sewn (rare), 

 155 ib., 1746 



15603 Another Copy, wanting the plates ; sewn, 6s 



Including his experiments with three powerful Leyden jars, when he obtained sparks that could be seen at a distance 

 of 200 yards in broad daylight. From their discharge he inferred that the phenomena of lightning and thunder must be 

 the result of an electric discharge on a large scale. Winkler was also the first to mention that the earth was a good conductor 

 of electricity. 



There was no copy of any of the above three works, the only important ones written by the author on electricity, in the 

 Ronalds Library. 



15604 WISLICENUS (Johannes ; Univ. Leipzig) Uber die raumliche Anordnung der Atome in 

 ORGANISCHEN Molekulen und ihre Bestimmung in georaetrisch-isomeren ungesiittigten Verbin- 

 dungen, 2. mit Nachtragen versehener Abdruck ; ivith 186 diagrams, impl. Svo. sewn, 2s Qd 

 (p. M. 4) Leipzig, 1889 



One of the classic contributions to stereo-chemistry. 



' Wislicenus has attempted to explain phenomena of this kind [metamerism] by the aid of an hypothesis propounded 

 by van t'Hoffand Lebel. According to this hypothesis, which was designed with the object of explaining the optical 

 activity of isomeric compounds, the centre of gravity of an atom in carbon is supposed as in the middle of a tetrahedron, 

 and its four affinities as at the four corners .... Wislicenus has made this hypothesis the basis of his discussions and 

 experimental researches.' — Prof. E. v. Meyer. 



15605 WOLLASTON (William Hyde, m.d., f.r.s.) On the Apparent Direction of Eyes in a 

 Portrait, with 4 fine copperplates (2 with superposed slips, showing the relation of facial ex- 

 pression to the eyes) by Sir Thomas Lawrence, r.a., 4to. (pp. 10), sewn (rare), lOs 1824 



' An ingenious explanation of the apparent direction of eyes in a portrait, illustrated by his friend Sir Thomas 

 Lawrence '. — D. N. £. 



15606 On the Elementary Particles of Certain Crystals (Bakerian Lecture), ivith plate, 



4to. (pp. 15), seum, Ss Qd 1813 



15607 On Metallic Titanium, 4to. (pp. 6\ sewn, 2s 1822 



15608 Method of Drawing Extremely Fine Wires ; and Description of a Single Lens 



Micrometer, with plate, 4to. (pp. 9), sewn, is 6d 1813 



' This method is still used in the construction of the bolometer.'— D. N. B. 



15609 On a Method of rendering Platina malleable (Bakerian Lecture), with plate, 4to. 



(pp. 8), seivn (scarce). Is Qd 1828 



■ The discovery of a method for producing pure platinum and welding it into vessels, made about 1804 and published 

 as the Bakerian lecture in 1S2S, has proved of the highest importance, scientific and commercial, from the fact that the 

 metal is attacked by extremely few chemical reagents. The Royal Society in 1S28 awarded Wollaston a royal medal for 

 his work. It was from this source that he accumulated his considerable fortune.'— D. N. B. 



15610 On the Primitive Crystals of Carbonate of Lime, Bitter-Spar, and Iron-Spar, 



4to. (pp. 4), sewn, 2s 6flJ 1812 



15611 Synoptic Scale of Chemical Equivalents, with plate, 4to. (pp. 22), sewn, with inscr. 



to Thomas Allan, F.B.S. (scarce)^ 10s Qd 1814 



' Wollaston's most important paper in theoretical chemistry. He proposes, in order to avoid undue use of hypothesis, 

 to replace Dalton's 'atomic weights' by 'equivalents' which were to' express the bare facts of quantitative analysis. 

 Wollaston's criticism of Dalton in this paper is fundamental. . . . The battle between ' atomic weights ' and equivalents 

 lasted, with many fluctuations, down to recent times.'— Z). iV. B. 



15612 YOUNO- (Thomas, m.d., f.r.s.) On the Theory of Light and Colours (Bakerian Lecture), 

 with plate, roy. 4to. (pp. 37), sewn (rare), 12* Qd 1801 



'A more detailed account of his doctrine of interference and its applications appeared in his brilliant memoir On the 

 Theory of I.iaht and Colours, which marks an epoch in the history of the subject. In it he showed that the colours of thin 

 and thick plates, of striated surfaces, and those seen at the edge of the shadow of an obstacle, could all be explained by 

 the interference of light undulations which had traversed different paths, and concluded with the proposition 'Radiant 

 light consists of undulations of the luminiferous ether'.'— D. N. B. 



15613 ZABABELLA (Giacomo Conte) Tabul.e Logic^e, in quibus suniraa cum Facilitate ac 

 Brevitate ea omnia explicantur, qu£e ab aliis prolixe declarari solent, Editio postrema, 4to. 

 old hf. calf (joint cracked), with auto, and inscr. by Thomas Taylor, '■ Flatonisf (as below), 

 10s 6d (col :) Francofnrti, Laz. Zetzner, 1608 



' Aristotelis alumni sumus nee pcenitet. T. Taylor. Ano. 1781.'— Inscr. cm last leaf. 



' Ses id^es philosophiques, et surtout sa methode appliquee a la Logique d'Aristote, firent autorite en Allemagne.'— 

 Biogr. Gen. 



FURTHER ADDENDA. 



15614 ADAMS (John Couch, f.r.s., Lowndean Prof. Astronomy and Geometry, Cantab. ; discoverer 

 of Neptune) SCIENTIFIC Papers, edited by William Gryll's Adams, f.r.s., and Ralph Allen 

 Sampson, f.r.a.s., with Memoir by J. W. L. Glaisher, f.r.s., with fine portrait on India paper, 

 fs. of ^p. MS., and diagrams, 2 vols. 4to. cl., 15s (p. £2. 10s) Univ. Press, Cambridge, 1896-1900 



