INTERNATIONAL SCIENTIFIC SERIES. 



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1. FORMS OF WATER. Bv Prof. Johx Ttxdall. |1.50. 



2. PHYSICS AND POLITICS. Bv W. Bagehot. $1.50. 



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4. MIXD AND BODY. Bv Alexaxdee Baix. LL.D. $1.50. 



5. THE STUDY OF SOCIOLOGY. Bv Heebeet Spencee. $1.50. 



6. THE NEW CHEMISTRY. Bv Prof. Josiah P. Cooke, Jr. $2.00. 



7. THE CONSERVATION OF ENERGY. Bv Prof. Balfole Stewaet. $1.50. 



8. ANIMAL LOCOMOTION. Bv J. B. Pettigkew, M.D. $1.75. 



9. RESPONSIBILITY IN MENTAL DISEASE. By H. MArDSLET, M.D. 



$1.50. 



10. THE SCIENCE OF LAW. Bv Prof. Sueldon Amos. $1.75. 



11. ANIMAL MECHANISM. By E. J. Maeet. 117 Illustrations. $1.75. 



12. CONFLICT BETWEEN RELIGION AND SCIENCE. By J. W. Dbapee, 



M.D. $1.75. 



13. THE DOCTRINE OF DESCENT, AND DARWINISM. By Prof. O. Schmidt. 



$l..-.o. 



14. THE CHEMISTRY OF LIGHT AND PHOTOGRAPHY. By Dr. Heema>n 



Yogel. 100 Illustrations. $2.00. 



15. FUNGI; iheir Nature, Influence, and Uses. By M. C. Cooke, LL.D. Edited 



bv M. J. Berkeley. 109 Illustrations. $1.50. 



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



Yale CoUegre. $1.50. 



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



Jevoxs, M. a., F. R. S. $1.75. 



18. THE NATURE OF LIGHT. By Dr. E. Lommel. SS Illustrations and a Plate 



of Spectra in Chromo-lithographv. $2.00. 



19. ANIMAL PARASITES AND MESSMATES. By Prof. M. Yan Beneden. 



bo Illustrations. $1.50. 



20. ON FERMENTATIONS. By P. ScHf tzenbeegee. $1.50. 



21. THE FIVE SENSES OF MAN. Bv Prof. J. Beenstein. $1.75. 



22. THE THEORY OF SOUND IN ITSRELATION 10 MUSIC. By Prof. Pieteo 



Blaseena. Numerous Woodcuts. $1.50. 



23. STUDIES IN SPECTRUM ANALYSIS. Bv J. N. Lockyee. $2.50. 



24. A HISTORY OF THE GROWTH OF THE" STEAM-ENGINE. By Robeet 



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



25. EDUCATION AS A SCIENCE. Bv Alex. Bain. LL.D. $1.75. 



26. MODERN CHROM.ATICS. Bv Prof. O. N. Rood. 130 original Illustrations. $2.00. 



27. THE HUMAN SPECIES. BV A. De Quateefages. $2.00. 



2S. THE CRAYFISH : An Introduction to the Study of Zoology. By Prof. T. H. 

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29. THE ATOMIC THEORY. By Ad. Wuetz, Membre de rinstitut, etc. Trans- 



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30. ANIMAL LIFE AS AFFECTED BY THE NATURAL CONDITIONS OF 



EXISTENCE. By Prof Kael Semper. $2.00. 



81. SIGHT : An Exposition of the Principles of Monocular and Binocular Vision. By 



Joseph Le CoNTE, LL. D. With numerous Illustrations. $1.5U. 



82. GENERAL PHYSIOLOGY OF MUSCLES AND NERVES. By Dr. I. Rosen- 



thal. With 75 Woodcuts. $1.50. 



33. ILLUSIONS: A Psvchological Study. Bv James Sclly. $1.50. 



34. THE SUN. By C. A. Yolng. Ph.D., LL.D.. Professor of Astronomy in the 



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