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. 
BERCEN’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 
on chemistry are interesting and attractive. 
Elements of Chemistry. Chemical Exercises. 
Introduction to Chemical Science. Chemical Experiments. 
BLAISDELL'S PHYSIOLOCIES. 
_ 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 
preservation 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. 
How to Keep Well. (Revised Edition.) 
Our Bodies and How We Live. (Revised Edition.) 
Life and Health. 
Practical Physiology. 
GINN & COMPANY Publishers 
BOSTON NEW YORK CHICAGO LONDON 
