450 HENRY SOTHERAN & CO., 140, STRAND, W.C, AND 43, PICCADILLY, W. 



8877 HANBURY (Daniel, f.r.s. ; pharmacist). Portrait of, engraved on steel hy Charles Henry 

 Jeens, proof before letters, 35 {Saec. XIX ] 



8878 The Same, on India paper, signed by the engraver, As Qd 



8879 HANCOCK (Thomas) Personal Narrative of the Origin and Progress of the Caou- 

 tchouc or India-Rubber Manufacture in England, with the Plants from which Caoutchouc 

 is obtained, its Chemical Analysis, Statistical Tables, etc. etc., and Appendix, containing 

 Specifications of the Author's Patents, with lithographic portrait and numerous plates, 8vo. 

 cl., uncut (scarce), £1. 5* 1857 



The author, a member of the firm of Charles Mackintosh & Co., of London (the eponymous originators of mackintoshes), 

 was the founder of the indiarubber trade in England, and may even be held remotely responsible for the motor-car 

 pandemonium. His chief inventions were those of ' masticated ' indiarubber, and of hard indiarubber, and in connexion 

 ■with vulcanised indiarubber. 



' Although Hancock was not the inventor of vulc anising in the strictest sense of the word, he first showed that 

 sulphur alone is sufficient to effect the change, where as Goodyear employed other substances in addition. Hancock 

 also discovered that if the vulcanising process is conti nued, and a higher temperature employed, a horny substance, 

 now called vulcanite or ebonite, is produced '.— D. N. B. 



8880 HANDBUCH der PHYSIK, unter Mitwirkung von R. Abegg, F. Auerbach, A. Bemporad, 



F. Braun, M. Cantor, S. Czapski, P. Drude, K. Exner, L. Graetz, H. Kayser, M. v. Rohr, 

 u. A. herausgegeben von A. Winkelmann, 2. [neueste und ganzlich umgearbeitete] Auflage, 

 Band I. Ill— VI ; with 1557 illustrations, 5 thick vols. roy. 8vo., w. 4-6 in the original hf. 

 moleskin, and the rest sewn, £7. (p. M. 202) Leipzig, 1905-8 



Inhalt:— T. AUgemeine Physik : III. Warme : IV- V. Elektrizitat und Magnetismus: VI. Optik. 

 The most extensive treatise on the subject hitherto published, and of well-known excellence. 



8881. HANDL (Alois), und Adolf WEISS : Untersuchungen liber den Zusammenhang in den 

 Anderungen der Dichten und Brechungsexponenten in Gemengen von Flussigkeiten und 

 Verbindungen von Gasen ; with plate, roy. 8vo. (pp. 53), sewn, 2s 6c? \_Wien, 1858] 



8882 HANDMANN (Rudolf) Der neue Egger'sche electromagnetische Motor, und die 

 eleetromagnetische Triebkraft im Allgemeinen ; with plate and 32 woodcuts, 8vo. sewn, 2s Qd 



IWii Th ^tp7* 1 8T9 



8883 HANDWbRTERBUCH der CHEMIE und PHYSIK, von E. F. August, F. W. Barentin, 

 W. H. Dove u. A. ; with woodcuts, 3 vols. 8vo. calf, Ss 6d Berlin, 1842-50 



8884 der NATURWISSENSCHAFTEN, herausgegeben von E. Korschelt (Zoologie), 



G. LiNCK (Mineralogie und Geologic), F. Oltmanns (Botanik), K. ScHAUM (Chemie), H. Th. 

 Simon (Physik), M. Verworn (Physiologic) und E. Teichmann (Hauptredaktion) ; with hundreds 

 of illustrations, 10 thick vols. impl. 8vo. new hf. calf, £11. 10* Jena, in progress 



a very important new publication treating, in the form of an encyclopaedia, of the whole subject of natural sciences. 

 The work, which is to be completed within the next three or four years, may also be had in 80 parts (two of which have 

 hitherto been published) at 2s 6d nett each. 



A specimen part may be had post free on application. 



8885 HANKE (Friedrich Gottlob), et Benjamin Gottlieb Binder: Principia Theoriae de 

 Infinito Mathematico et Demonstratio Possibilitatis Parallelarum ; with diagrams, 

 sm. 4to. (pp. 21), seum (rare), 8s 6d Lipsiae, 1751 



Unknown to PoggendorfT. 



8886 HANKEL (Hermann, Univ. Tubingen) Die Entwickelung der Mathematik in den 

 letzten Jahrhunderten, 8vo. (pp. 36), sewn, 2s Tubingen, 1869 



8887 Theorie der Complexen Zahlensysteme, inbesondere der gemeinen imaginaren 



Zahlen und der Hamilton'schen Quaternionen, nebst ihrer geometrischen Darstellung; with 

 36 diagrams, Bvo. hf. cl., with bookplate of Prof H. W. Lloyd Tanner, F.B.S., 3s Qd Leipzig, 1867 



Containing 'an admirable historical summary of the theory of the complex variable.' — W. W. R. Boll. 



8888 HANN (James ; m.i.c.e.), and Placido and Justo GENER, c.ee. : The Steam Engine for 

 Practical Men, with infolding plates, woodcuts, and diagrams, 8vo. cl., 3* 1854 



8889 HANSEMANN (Gustav) Die Atome und ihre Beavegungen : ein Versuch zur Ver- 

 ALLGEMEINERUNG der Kronig-Clausius'schen Theorie der Gase ; with 4 folding plates, 8vo. 

 sewn, 3s Coin, 1871 



8890 HANSEN (Peter Andreas; F.R.S.) I. Allgemeine Auflosung eines beliebigen Systems 

 von linearischen Gleichungen. II. Ueber die Entwickelung der Grosse {i-2 a H + a^)-h 

 nach den Potenzen von a, large impl. 8vo. sewn, 2s Qd Leipzig, 1849 



8891 Ueber die Chronometer, welche Herr Kessels verfertigt, aus den Notizen liber ihren 



Gang von Bessel, Bohnenberger, Hansteen, Schumacher, und Zahrtmann gezogen, mit 

 der vortheilhaftesten Art sie zu Langenbestimmungen zu gebrauchen u. s. w., 8vo. (pp. 55), sewn, 

 3s 6d Altona, 1836 



8892 Relationen einestheils zwischen Summen und Differenzen und anderntheils zwischen 



Integralen und Differentialen, large impl. 8vo. sewn {title soiled), 3s Leipzig, 1865 



8893 Tables de la Lune, construites d'apres le Principe Newtonien de la Gravitation 



Universelle ; impl. 4to. cl., 17s 6d Londres, 1857 



' Hansen's lunar tables, when first introduced, were very exact, and still remain the best extant.'— 2V^ezson. 

 The above copy includes the corrections by the Nautical Almanac Office (1862), and those of the American 

 Bphemeris (1878). 



8894 HAKANT (Henri), et Pierre LAFFITTE : Lecons de ('osmographie ; with 7 folding 

 plates, 8vo. sewn {o.p.), 3s ' 1853 



8895 HARCOUilT (Augustus George Vernon, f.r.s.), and Henry George MABAN: Exer- 

 cises in Practical Chemistry, 5th [latest] Edition, revised, with 116 woodcuts, and table, cr. 

 8vo. cl., 5s (p. 10s 6d) Clarendon Press, Oxford, 1897 



8896 HAKDEN (Arthur ; f.r.s.. Lister Inst.) ZYMASE and Alcoholic Fermentation, 8vo. (pp. 15), 

 seivn. Is 1905 



V. RoscOE, No. 4078, ante. 



