Transcriber’s Notes:
Italics and bold face in the printed work have been transcribed as
_italics_ and =bold face=, respectively. Fractions are given as, for
example, 1/2 and 1-1/2. D^R represents a D followed by a superscript
R.
Depending on the hard- and software used to read this text and their
settings, not all symbols and characters may display as intended or
display at all, and some tables may not line up properly.
More Transcriber’s Notes and a list of corrections and changes made
may be found at the end of this text.
THE
CIRCLE OF KNOWLEDGE
ESSENTIAL FACTS OF EVERYDAY INTEREST IN
NATURE, GEOGRAPHY, HISTORY, TRAVEL, GOVERNMENT,
SCIENCE, INVENTION, EDUCATION,
LANGUAGE, LITERATURE, FINE ARTS, PHILOSOPHY,
RELIGION, INDUSTRY, BIOGRAPHY,
HUMAN CULTURE, AND UNIVERSAL PROGRESS
_=Easy to Read; Easy to Understand; Easy to Retain=_
EDITOR-IN-CHIEF
HENRY W. RUOFF, M.A., LITT.D., D.C.L.
EDITOR OF “THE CENTURY BOOK OF FACTS,” “THE CAPITALS OF THE WORLD,”
“LEADERS OF MEN,” “THE STANDARD DICTIONARY OF FACTS,”
“MASTERS OF ACHIEVEMENT,” “THE VOLUME LIBRARY,”
“THE HUMAN INTEREST LIBRARY,” ETC.
_NUMEROUS TEXT ILLUSTRATIONS, MAPS
TABLES, DUOTONE AND COLOR PLATES_
Exclusive Publishers for Canada and
Newfoundland:
THE JOHN A. HERTEL CO., Ltd.
TORONTO, ONTARIO
THE STANDARD PUBLICATION COMPANY
BOSTON · WASHINGTON · CHICAGO
1917
Copyright, 1916, by
THE STANDARD PUBLICATION COMPANY
Copyright, 1917, by
THE STANDARD PUBLICATION COMPANY
All Rights Reserved