BOOKS OF POPULAR SCIENCE 



THE EARTH AND ITS RHYTHMS 



By Charles Schuchert and Clara M. LeVexe. A 

 thoroughly scientific presentation of geology in all its 

 phases, so attractively written that it reads like a ro- 

 mance. The authors are of the faculty of Yale Uni- 

 versity. Excellently illustrated. 



PRIMITIVE HEARTHS IN THE PYRENEES 



By Ruth Otis Sawtell and Ida Treat. The story of 

 a summer's exploration in the haunts of prehistoric 

 man. The best simple explanation of prehistoric man 

 that there is. "A primer of prehistorical research, but 

 • also a splendid adventure." — Harper's Magazine. Illus- 

 trated with photographs and charming sketches. 



THE STORY OF THE MOON (Revised Edition) 



By Garrett P. Serviss. This is one of the most 

 popular and interesting books on the Moon that has 

 ever been written. With the aid of the best photographs 

 and the testimony of the greatest telescopes it tells 

 exactly what a visitor from the Earth would see and 

 experience on the Aloon's surface. This revised edition 

 brings the book up to the minute. 



THE SUN (Revised Edition) 



By Charles G. Abbot. Here a great astronomer 

 has told for popular reading what is known of the Sun 

 and its relation to the Earth and starry universe in 

 general. Illustrated. 



GEOLOGY 



By Albert Perry Brigham, revised and extended by 

 Frederick A. Burt. This simple and entertainingly 

 Avritten book has long been a standard popular presenta- 

 tion of geology. Professor Burt has brought it up to 

 date and added a very valuable section on economic 

 geology. There are exceptional illustrations. 



D. APPLETON AND COMPANY 

 New York London 



