NATURAL SCIENCE TEXT-BOOKS. 
Principles of Physics. A Text-book for High Schools and Academies. 
By ALFRED P. GAGE, Instructor of Physics in the English High 
School, Boston. $1.30. 
Eldments of Physics. A Text-book for High Schools and Academies. 
By ALFRED P. GAGE. $1.12. 
Introduction to Physical Science. By ALFRED P. GAGE. $1.00. 
Physical Laboratory Manual and Note-Book. By Aurrep P. GAGE. 
do cents, 
Introduction to Chemical Science. By R. P. WituiAms, Instructor in 
- Chemistry in the English High School, Boston. 80 cents. 
Laboratory Manual of General Chemistry. By R. P. WILLIAMs. 25 cents. 
Chemical Experiments. General and Analytical. By R. P. WILLiAMs. 
For the use of students in the laboratory. 50 cents. 
Elementary Chemistry. By Greorce R. Wuire, Instructor of Chemistry, 
Phillips Exeter Academy. $1.00. 
General Astronomy. A Text-book for Colleges and Technical Schools. 
By CHAaRrLEs A. Youne, Professor of Astronomy in the College of 
New Jersey, and author of ‘‘ The Sun,”’ etc. $2.25. 
Elements of Astronomy. A Text-book for High Schools and Academies, 
with a Uranography. By Professor CHARLES A. Youna. $1.40. 
Uranography. 30 cents. i 
Lessons in Astronomy. Including Uranography. By Professor CHARLES 
A. Young. Prepared for schools that desire a brief course free from 
mathematics. $1.20. 
An Introduction to Spherical and Practical Astronomy. By Dascom 
GREENE, Professor of Mathematics and Astronomy in the Rensselaer . 
Polytechnic Institute, Troy, N.Y. $1.50. 
Elements of Structural and Systematic Botany. For High Schools and 
Elementary College Courses. By DouGLAs HouGHTON CAMPBELL, 
Professor of Botany in the Leland Stanford Junior University. $1.12. 
Elements of Botany. By J. Y. Bercesn, Jr., Instructor in Biology in the 
English High School, Boston. $1.10. 
Laboratory Course in Physical Measurements. By W. C. SaBine, 
Instructor in Harvard University. $1.25. 
Elementary Meteorology. By Wixtu1Am M. Davis, Professor of Physical 
Geography in Harvard University. With maps, charts, and exercises. 
$2.50. 
Blaisdell’s Physiologies: Our Bodies and How We Live, 65 cents; How to Keep 
Well, 45 cents; Child’s Book of Health, 30 cents. 
A Hygienic Physiology. For the Use of Schools. By D. F. Lincoun, M.D., 
author of ‘‘ School and Industrial Hygiene,” etc. 80 cents. 
Copies will be sent, postpaid, to teachers for examina- 
tion on receipt of the introduction prices given above. 
GINN & COMPANY, Publishers, Boston, New York, Chicago, Atlanta. 
