THE 



POPULAR SCIENCE LIBRARY. 



Under this title will be issued a series of neat and attractive books, 

 at the uniform price of a dollar each, that shall bring the varied and im- 

 portant results of modern scientific inquiry within easy reach of all 

 classes of readers. Much of the wonderful intellectual activity of the 

 age is taking a scientific direction, and nearly every department of 

 knowledge is powerfully affected by it ; but the results are usually em- 

 bodied in books so large that many people have neither money to buy 

 them nor time to read them, while the reproduction of the ripest scien- 

 tific literature, in form suitable for extensive diffusion, has by no means 

 kept pace with the general advance of thought. The "POPULAR 

 SCIENCE LIBRARY" will contribute to this desirable object by pre- 

 senting a series of volumes -original, translations, reprints, and abridg- 

 ments with copious illustrations, in all the departments of science that 

 are of practical and popular interest. It will take a free range in its 

 choice of subjects, and treat them in a way that will be most interesting 

 and profitable to general readers. 



The following'works have just been issued, to be followed by others 

 of a similar character, from time to time. 



Price, $l.oo each. 



I. HEALTH. By Dr. EDWARD SMITH, F. R. S. 



II. THE NATURAL HISTORY OF MAN. By 



Prof. A. DE QUATREFAGES. " Illustrated. Translated from the French 

 by Eliza A. Youmans. 



III. THE SCIENCE OF MUSIC. Illustrated. By SEDLEY 

 TAYLOR. 



IV. OUTLINE OF THE EVOLUTION PHI- 

 LOSOPHY. By Dr. E. GAZELLES. Translated from the 

 French by Rev. O. B. Frothingham. 



V. ENGLISH MEN OF SCIENCE: their Na- 

 ture and Nurture. By FRANCIS GALTON, F. R. S. 



D. APPLE TON & CO., Publishers, 549 6* 551 Broadway, N. Y. 



