The Wonder Book of Knowledge

The Wonder Book of Knowledge. 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.