8 SCIENCE AND PHILOSOPHY. 



The Chemistry of Common Life. By the late Prof. J^mes F. "W. John- 

 ston. A uew edition, r-ivised and enlarge<l. and brou-'ht down to the Present 

 Ti:iie, by Arthur IlfiRBERT Church, M. A., Oxon , author of '■ Food : its Sources, 

 Constituents, and Uses." Illustrated with Maps and numerous Engravings on 

 Wood, lu one volume. 12mo. Cloth, $2.03. 



A Hand-Book of Cliemioal Technolosry. By Efdolph Wagner. Ph. D., 

 Professor of ^Jhemical lechaolofry at the ITniversity of Wurtzburs. Translated 

 and edited, from the eig'hth German edition, with Extensive Additions, by VV. 

 Ceookes, p. E. S. With 336 Illustrations. 8vo. Cloth, $5.00. 



GEOLOGY. (See also Le Conte's Works.) 



Applied Geology. A Treatise on the Industrial Kelations of Geolofrical Struct- 

 ure; and on the Nature. Occurrence, and L'ses of Substaui'es derived from Geo- 

 logical Sources. By SA.MrEi, G. Williams, Professor of General and Economic 

 Geology in Cornell University. 12mo. Cloth, $1.40. 



Principles of Geolo°ry ; or. The Modern Changes of the Earth and its Inhabit- 

 ants, considered as illustrative of Geology. By Sir I^harlf.s Ltkll, Bart. Illus- 

 trated with Maps, Plates, and Woodcuts. Eevised edition. 2 vols., royal 8vo. 



Cloth, $8.00. 



Town Geologry. Bv the Eev. Charles Kingslet, F. L. S., F. G. S., Canon of 

 Chester 12mo. Cloth, $1.50. 



Coal ResioTJS of America ; their Topography, Geology, and Development. 

 By James Macfarlane, A M. With a Colored Geological .Map of Pennsylvania, 

 a Railroad .Map of all the Coal Eegions, '24 other Maps, showing the Counties in 

 the States containing Coal, ^b full-page and 20 smaller Illustrations. Svo. TOO 

 pages. Cliith, $5.00; sheep, $5.00. 



An American Geological Railway Gu'de, giving the Geological Forma- 

 tion at Every Eailway ^tation, with Notes on Intere.sting Places on the Eoutes, 

 and a Description of each of the Formations. By James Macfarlane, A. M. 

 Svo. Flexible cloth, $1.50. 



Natural "Resources of the TJnited States. By Jacob Haeets Patton, 

 M. A., Ph.D. Svo. Clnth, $3.00. 



The Study of Rocks. An Elementary Text-Book in Petrology. With Ilhis- 

 trations. By Frank Eutlet, of the English Geological Survey. 16mo. Cloth, 



$1.T5. 



BOTANY, ETC. (See also Darwin's Works.) 



Pung-i; their Natures and Uses. By M. C. Cooke. Edited by the Eev. M. J. 

 Bkukelev. 12mo. Cloth, $1.50. 



Naturalist's Ramljles about Eome. By Dr. Charles C. Abbott. New 



edition, revised. 12rao. Cloth, ,$1.50. 



Orig'in of Cultivated Plants. By Alphonse de Candolle. 12mo. Cloth, 

 $2 01). 



The Origin of Floral Structures throug-h Insects and other 

 As'ancies. By the Eev. George Henslow, Professor of Botany, Queen's 

 College. International Scientific Series. With numerous Illustrations. 12mo. 

 Cloth, $1.75, 



Tha Geolo^rical History of Plants. By Sir J, William Dawson, F, E. S. 

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Primary Class-Book of Botany, d^^sigrned for Common Schools 

 and Pamiliss ; containins the Elements of Vegetable Structure and Physi- 

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Flowers and their Pedig-rees. By Grant Allen, Illustrated, 12mo. 

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