Leading Scientific Text-Books 



YOUNG'S ASTRONOMIES 



Professor Young's position among the great astronomers of the 

 world is firmly established. As a clear and forcible writer he is 

 equally well known. His series of astronomical text-books combines 

 in an unusual degree the qualities of accurate scholarship, simplicity 

 of style, and clearness of statement which belong to every successful 

 text-book. 



Lessons in Astronomy, Revised Edition. Manual of Astronomy, 

 Elements of Astronomy. General Astronomy. 



BERGEN'S BOTANIES 



Bergen's botanies were the first to combine a standard text, a prac- 

 tical laboratory course, and a key for systematic work. The com- 

 bination of these,three things brought them at once into a leading 

 position among botany texts,— a position they have since maintained. 



Elements of Botany, Revised Edition (now ready) ^ 



Foundations of Botany. 



Notebook to accompany Bergen's Text- books of Botany or for 



general use in Botanical Laboratories. 



WILLIAMS' CHEMISTRIES 



In addition to being scientifically accurate, the author's text-books 



Elements of Chemistry. Chemical Exercises. 



Introduction to Chemical Science. Chemical Experiments. 

 BLAISDELL'S PHYSIOLOGIES. 



Blaisdell's physiologies have maintained a remarkable popularity 

 in the educational world. The books present in clear and simple 

 language the latest and most trustworthy facts on physiology and 

 hygiene. Special attention is given to the subject of the care and 

 preser\'ation of the health. Important facts are illustrated by a 

 series of simple experiments which the pupil can perform with little 

 or no outlay for apparatus. This feature is peculiar to the Blaisdell 

 books and has been found no less valuable than original. 



Child's Book of Health. 



flow to Keep Well. (Revised Edition.) 



Our Bodies and How We Live. (Revised Edition.) 



Life and Health. 



Practical Physiology. 



GINN & COMPANY Publishers 



BOSTON NEVYORK CHICAGO LONDON 



