THE WONDER BOOK OF KNOWLEDGE
Reading edition
THE MARVELS OF MODERN INDUSTRY AND INVENTION THE INTERESTING STORIES OF COMMON THINGS THE MYSTERIOUS PROCESSES OF NATURE SIMPLY EXPLAINED
COMPILED AND EDITED BY HENRY CHASE HILL WITH THE CO-OPERATION OF EXPERTS REPRESENTING EACH INDUSTRY
Illustrated with 780 Photographs and Drawings
PHILADELPHIA THE JOHN C. WINSTON COMPANY PUBLISHERS
Copyright, 1921 By L. T. MYERS Copyright, 1917-19