SCIENCE 



New Series. 

 Vol. IV. No. 87. 



Friday, August 28, 1896. 



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The Principles of the Transformer. 



By Dr. FREDERICK BEDELL, of Cornell University. 

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This book contains an extensive treatment of the laws and principles governing the operation of the 

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 Testing. Graphical methods are freely employed. The book contains about 400 pages with over 200 

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Lectures on Human and Animal 

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By "WiLHELM WuNDT, Professor of Philosophy in the 

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 E. B. Titchener. Second Edition of Translation 

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The Biological Problem of To-Day. 



Preformation or Epigenesis. The Basis of a Theory 

 of Organic Development. By Professor Dr. 

 Oscar Hertwig, Director of the Second Ana- 

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 Authorized Translation by P. Chalmers Mitchell, 

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An Outline of Psychology. 



By EDWARD BRADFORD TITCHENER, A.M., Ph.D., 



Sage Professor of Psychology at Cornell University. Co-editor of "■Hind,'' and of the "American Journal of 



Psychology. ' ' 



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Modern Optical Instruments and Their 

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By Henry Oeford. Author of "Lens Work for 

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Engineer's Draughtsman's Work. 



Hints for Beginners. By a Practical Draughtsman. 

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A New Book by Sir JOHN LUBBOCK— Now Ready. 



The Scenery of Switzerland, 



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