xi + 388 pages. Price $1.68
WORLD BOOK COMPANY
Yonkers-on-Hudson, New York
2126 Prairie Avenue, Chicago
NEW-WORLD SCIENCE SERIES
Edited by JOHN W. RITCHIE
The publication of books that "apply the world's knowledge to the world's needs" is the ideal of this house and it is intended that the different volumes of this series shall express this ideal in a very concrete way.
Completed