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I. FORMS OF WATER, In Clouds, Rain, Rivers, Ice, and Glaciers. By Hot 



John Tyndall. $1.50. 

 II. PHYSICS AND POLITICS; or, Thoughts on the Application of the Princi- 

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 HI. FOODS. By Edward Smith, M.D.,LL.B.,F.R.S. $1.75. 

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 VII. THE CONSERVATION OF ENERGY. By Prof. Balfour Stewart, 



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 VIII. ANIMAL LOCOMOTION; or, Walking, Swimming, and Flying, with a 

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 IX. RESPONSIBILITY IN MENTAL DISEASE. By H. Maudsley, M. D. 

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 XI. ANIMAL MECHANISM. A Treatise on Terrestrial and Aerial Locomotion. 



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 XII. THE HISTORY OF THE .CONFLICT BETWEEN RELIGION AND 

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XIII. THE DOCTRINE OF DESCENT, AND DARWINISM. By Prof. Oscab 



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XIV. THE CHEMISTRY OF LIGHT AND PHOTOGRAPHY. By Dr. Her- 



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 XV. FUNGI; their Nature, Influence, and Uses. By M. C. Cooke, LL. D. Ed- 

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 XVI. THE LIFE AND GROWTH OP LANGUAGE. By Prof. W. D. Whit- 

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



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 XVIII. THE NATURE OF LIGHT, with an Account of Physical Optics. By D- . 

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 XIX. ANIMAL PARASITES AND MESSMATES. By M. Van Beneden, Pro- 

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 XX. ON FERMENTATIONS. By P. Schutzenberger, Director at the Chemi- 

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 XXI. THE FIVE SENSES OF MAN. By J. Bernstein, O. O. Professor in the 

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 XXIIL STUDIES IN SPECTRUM ANALYSIS. By J. Norman Lockyer. Il- 

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 XXIV. A HISTORY OF THE GROWTH OF THE STEAM-ENGINE. By 

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 XXV. EDUCATION AS A SCIENCE. By Alexander Bain, LL. D., Professor 

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 XXVI. MODERN CHROMATICS, with Applications to Art and Industry. By 

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 XXVII. THE HUMAN SPECIES. By A. Di Quatrefages, Professor of Anthro- 

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