IMPORTANT SCIENTIFIC WORKS.— (Continued.) 



Gore, G. The Art of Electro-Metallurgy ; including all known of Elec- 

 tro-Deposition. Illustrated. 16mo. Cloth, $2.50. 

 x. 



Gosse's Evenings at the Microscope; or, Researches among the Mi- 

 nuter Organs and Forms of Animal Life. 12mo. Goth, $1.50. 



XL 



Harris, George, F. S. A. Civilization considered as a Science. 12mo. 

 Cloth, $1.50. 



XII. 



Helmholtz, H. Popular Lectures on Scientific Subjects. Translated 

 by E. Atkixson, Ph. D., F. C. S. With an Introduction by Pro- 

 fessor Tyndaix. 12mo. Cloth, §2.00. 



XIII. 



Ilinton, James. Physiology for Practical Use. With an Introduc- 

 tion by Professor E. L. Yocuaxs. 12mo. Cloth, $2.25. 

 xrv. 



Hoffmann, Frederick. Manual of Chemical Analysis, as applied to 

 the Examination of Medicinal Chemicals. A Guide for the Deter- 

 mination of their Identity and Quality, and for the Detection of 

 Impurities and Adulterations. For the Use of Pharmaceutists, 

 Physicians, Druggists, and Manufacturing Chemists, and Students. 

 8vo. Cloth, $3.00. 



XT. 



Johnston, Professor James F. W. The Chemistry of Common 

 Life. A new edition, revised, enlarged, and brought down to the 

 Present Time, by Arthur Herbert Church, M. A. Oxon., author 

 of " Food : its Sources, Constituents, and Uses." Illustrated with 

 Maps and numerous Engravings on Wood. 12mo. Cloth, $2.00. 



XVI. 



Le Conte, Professor Joseph. Elements of Geology. A Text-Book 

 for Colleges and for the General Reader. 8vo. Cloth, $4.00. 



