SECTION V. — CHEMISTRY, PURE AND APPLIED. 547 



Humboldt, Alexander von. 



*Versuche liber die chemische Zerlegung des Luftkreises und iiber 

 einige andere Gegenstande der Naturlehre. Braunschweig, 1799. 

 pp. [iv]-258, i2mo. 2 plates. 



Hume, Gilbert Langdon. 



Chemical Attraction, an Essay in five chapters, with an historical intro- 

 duction. Cambridge, 1835. PP- viii-i75-[ii], 8vo. 



The history occupies pp. 1-84. 



Hummel, J. J. 



The Dyeing of Textile Fabrics. London, 1885. pp. xii-534, i2mo. 



Die Farberei und Bleicherei der Gespinnstfasern. Uebersetzt 

 von E. Knecht. Berlin, 1888. 



Hunt, Robert. 



Photography ; a treatise on the chemical changes produced by solar 

 radiation, and the production of pictures from nature, by the 

 Daguerreotype, calotype, and other photographic processes, with 

 additions by the American editor. New York, 1851. i2mo. 

 Researches on Light ; an examination of all the phenomena connected 

 with the chemical and molecular changes produced by the influence 

 of the solar rays, embracing all the known photographic processes 

 and new discoveries in the art. With a plate and woodcuts. 

 London, 1844. 8vo. 



Researches on light and its chemical relations, embracing a 

 consideration of all the photographic processes. Second 

 edition. London, 1854. 8vo. 



Hunt, Thomas Sterry. 



A New Basis for Chemistry: A Chemical Philosophy. Boston, 1887. 

 pp. viii-165, i2mo. 



Un systeme de chimie nouveaux. Traduit de I'anglais par 

 Spring. Paris, 1889. 

 On the Chemistry of the Earth. Annual Report of Smithsonian Insti- 

 tution for 1869. Washington, D. C, 187 1. 8vo. 



HuRCOURT, E. Robert d'. 



De I'eclairage au gaz. Developpements sur la composition des gaz 

 destines a I'eclairage sur la construction des fournaux et des 

 cheminees sur la pose des tuyaux, sur les pht^nomenes de la 

 lumiere, etc. Paris, 1863. pp. xi-521, 8vo. Plates. 



