IT X1.J.XM U J-fjLV^ J. JL.KJX\ iiil . 



VOJ. J-iJ.TO.ikJ Xlli.i 



Seven volumes, 8vo, price M10 16s. 6d. 

 A DICTIONARY OF CHEMISTRY, 



And the Allied Branches of other Sciences j founded on that of the late Dr. Ure. 

 By HENRY WATTS, B.A., F.R.S., 



Assisted by eminent Scientific and Practical Chemists. 



and are many of them experts in the epeeial 

 branches of the science which bear on their par- 

 ticular industries. They require to know the 

 latest discoveries, and tb keep them, as it were, 

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 Athenceum. 



" The English language is not rich in lexicons 

 of science: we would point to this work as a 

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 the practical analyst this work must prove of 



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 e a great gain ; and to the student who is true 



to his studies, it will prove an ever ready guide 

 Our manufacturers know the value of Chemistry 



THIRD SUPPLEMENTARY VOLUME. (Vol. VIII.) 



Completing the Record of Chemical Discovery to the year 1877. — In Two 

 Parts, of which the First is now ready, pp. 844, price 36s. cloth. Part II. in 

 the Autumn. 



" We cannot give this volume greater praise than by saying that it is worthy of the European re- 

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Bristol Mercury, 



London : Longmans and Co. 



R. FRIEDLANDER und SOHN, Natural-History Booksellers, 



Berlin (Germany) N.W., Carlstr. 11, 



Are publishing every fortnight, since January 1, 1879, 



NATURE NOVITATES: NATURAL-HISTORY NEWS. 



Bibliographical List of th© current Literature of all Nations on Natural History 



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Price 4 shillings per year (26 Numbers), post-free. Specimen number 



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Just published by the same, and will be sent free on receipt of 6d. in stamps, 

 CATALOGUE, NO. 293: PHYSICS AND CHEMISTRY. 



Containing a choice selection of Books and Papers on Natural Philosophy 

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R. Friedlander und Sohn, Berlin N.W., Carlstr. 11. 

 84 pp., with 136 Plates, demy 8yo, cloth, 30s. 



PHOTOGRAPHED SPECTRA. 



One Hundred and Thirty-six Photographs of Metallic, Gaseous, and other 

 Spectra, printed by the Permanent Autotype Process ; with Introduction, De- 

 scription of Plates, and Index ; and with an extra Plate of the Solar Spectrum 

 (showing bright lines) compared with the Air-Spectrum. 



By J. RAND CAPRON, F.R.A.S. 



..... "Mr. Capron has earned the thanks of spectroscopists for the large 

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 London : E. & F. N. Spon, 46 Charing Cross. 



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