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1. FORMS OF WATER, in Clouds, Rain, Rivers, Ice, and Glaciers. By Prof. JOHN 



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2. PHYSIO? AND POLITICS: or. Thoughts on the Application of the Principles 



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3. FOODS. By EDWARD SMITH. M. D.. LL. B.. F. R. S. $1.75. 

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5. THE STUDY OF SOCIOLOGY. By HEEBEBT SPEXCEB. $1.50. 



6. THE NEW CHEMISTRY. By Prot JOSIAH P. COOKZ, Jr., of Harrard Uni- 



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7. THE CONSERVATION OF ENERGY. By Prof. BALFOUB STEWART, LL.D., 



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8. ANIMAL LOCOMOTION : vrith a Dissertation on Aeronautics. By J. B. PETTI- 



GREW. M. D. Illustrated. $1.75. 



9. RESPONSIBILITY IN MENTAL DISEASE. By H. MAFDSLET. M. D. $1.50. 



10. THE SCIENCE OF LAW. By Prof. SHELDON Aiios. $1.75. 



11. ANIMAL MECHANISM. A Treatise on Terrestrial and Aerial Locomotion. By 



E. J. MAP.ET. 117 Illustrations. $1.75. 



12. THE HISTORY OF THE CONFLICT BETWEEN RELIGION AND SCI- 



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13. THE DOCTRINE OF DESCENT. AND DARWINISM. By Prof. OSCAR 



SCHMIDT, of Strasbunr University. $1.'^. 



14. THE CHEMISTRY OF LIGHT A'ND PHOTOGRAPHY. By Dr. HERHAXX 



YOGEL. 100 Illustrations, $2.00. 



15. FUNGI : their Nature, Influence, and Uses. By M. C. COOKE, LL. D. Edited by 



M. J. BEP.KELEY. 109 Illustrations. $1.50". 



16. THE LIFE AND GROWTH OF LANGUAGE. Bv Prof. W. D. WHITS ET, of 



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17. MONEY AND THE MECHANISM OF EXCHANGE. Bv W. STANLEY 



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1?. THE NATURE OF LIGHT. By Dr. E. LOMXEL. SS Illustrations and a Plate 

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19. ANIMAL PARASITES AND MESSMATES. By M. VAX BEXEDEX, Professcr 



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20. ON FERMENTATIONS. By P. SCHUTZENBEEGER. Director at the Chemical 



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21. THE FIVE SENSES OF MAN. By J. BEEXSTEJX. O. O. Professor in the Uni- 



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22. THE THEORY OF SOUND IN ITS RELATION TO MUSIC. By Prof. 



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2& STUDIES IN SPECTRUM ANALYSIS. By J. NOEJIAX LOCKTER. Illna 

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24. A HISTORY OF THE GROWTH OF THE STEAM-ENGINE. By ROBERT 



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25. EDUCATION AS A SCIENCE. Bv ALES. BAIX. LL. D. $1.75. 



26. MODERN CHROMATICS. By OG'DF.S N. ROOD. Professor of Physics in Co- 



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27. THE HUMAN SPECIES. 'By A. DE Qr.vTBEFAGES. $2.00. 



2;. THE CRAYFISH : An Introduction to the Study of ZoOlogr. Bv Prof. T H 

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29. THE ATOMIC THEORY. By AD. WruTZ, Membre de Plnstirat, etc. Trans- 



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30. ANIMAL LIFE AS AFFECTED BY THE NATURAL CONDITIONS OF 



EXISTENCE. Bv KAEL SEMPEB, Professor of the Universitv of Wurzbure. 

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