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



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2. PHYSICS AND POLITICS; or, Thoughts on the Application of the Principles 



of "Natural Selection" and '"Inheritance" to Political Society. By WALTEE 

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



4. MIND AND BODY. By ALEXANDER BAIN, LL. D. $1.50. 



5. THE STUDY OF SOCIOLOGY. By HERBERT SPENCER. $1.50. 



6. THE NEW CHEMISTRY. By Prof. JOSIAH P. COOKE, Jr., of Harvard Uni- 



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



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8. ANIMAL LOCOMOTION; with a Dissertation on Aeronautics. By J. B. PETTI- 



GKEW. M. D. Illustrated. $1.75. 



9. RESPONSIBILITY IN MENTAL DISEASE. By II. MAUDSLEY, M. D. $1.50. 



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



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



E. J. MAREY. 117 Illustrations. $1.75. 



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



ENCE. By J. W. DRAPER, M. D., LL. D. $1.75. 



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



SCHMIDT, of Strasburg University. $1.50. 



14. THE CHEMISTRY OF LIGHT AND PHOTOGRAPHY. By Dr. HERMANN 



VOGEL. 100 Illustrations. $2.00. 



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



M. J. BERKELEY. 109 Illustrations. $1.50. 



16. THE LIFE AND GROWTH OF LANGUAGE. By Prof. W. D. WHITNEY, of 



Yale College. $1.50. 



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



JEVONS. M. A., F. R. S. $1.75. 



18. THE NATURE OF LIGHT. By Dr. E. LOMMEL. 88 Illustrations and a Plate 



of Spectra in Chromo-lithography. $2.00. 



19. ANIMAL PARASITES AND MESSMATES. By M. VAN BENEDEN, Professor 



of the University of Louvain. S3 Illustrations. $1.50. 



20. ON FERMENTATIONS. By P. SCHUTZENBERGEI:. Director at the Chemical 



Laboratory at the Sorbonne. 28 Illustrations. $1.50. 



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



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



PIETRO BLASERNA. Numerous Woodcuts. $1.50. 



23. STUDIES IN SPECTRUM ANALYSIS. By J. NORMAN LOCKYER. Illus- 



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



H. TIHTRSTON, A. M.. C. E. 163 Illustrations. $2.50. 

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26. MODERN CHROMATICS. By OGDEN N. ROOD. Professor of Physics in Co- 



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27. THE HUMAN SPECIES. By A. DK QUATREFAGES. $2.00. 



28. THE CRAYFISH : An Introduction to the Study of Zoology. By Prof. T. H. 



HUXLEY. 82 Illustrations. $1.75. 



29. THE ATOMIC THEORY. By AD. WUKTZ, Membre de Plnstitut, etc. Trans- 



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30. ANIMAL LIFE AS AFFECTED BY THE NATURAL CONDITIONS OF 



EXISTENCE. By KARL SEMPER, Professor of the University of Wurzburg. 

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