+--------------------------------------------------------------------+ | TRANSCRIBER’S NOTES | | | | Transcriptions used: italic and bold texts are transcribed between | | underscores and equal signs respectively: text and =text=. Texts | | printed in small capitals are transcribed as ALL CAPITALS. | | Fractions are represented as, for example, 2-1/3 for two and one- | | third. | | | | Depending on the software used and its settings, not all characters| | may display properly. | | | | Footnotes [1], [2], etc. have been moved to the end of the text, | | before the Index. All footnotes contain credits for illustrations | | and/or text. | | | | More transcriber’s notes may be found at the end of this document. | +--------------------------------------------------------------------+
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 COPYRIGHT, 1917-19