
Leading Scientific Text-Books 
PnorrssoR 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 
t 
text-book. 
Lessons in Astronomy, Revised Edition. Manual of Astronomy. 
Elements of Astronomy. General Astronomy. 
BERCEN’S BOTANIES 
BrRGEN'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. 







eee BLAISDELL's physiologies have maintained a remarkable popularity 
 inthe 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 
y Re Es, 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. un ee 
How to Keep Well. (Revised Edition.) 
Our Bodies and How We Live. (Revised Edition.) 

/ GINN & COMPANY Publishers 




