ASTRONOMY FOR YOUNG FOLKS
Northern Portion of the Moon at Last Quarter
Taken with 100-inch Hooker Telescope of the Mt. Wilson Observatory (See Chapter XXI)
ASTRONOMY for YOUNG FOLKS
BY
ISABEL MARTIN LEWIS, A. M. (Connected with the Nautical Almanac Office of the U. S. Naval Observatory)
NEW YORK DUFFIELD AND COMPANY 1922
Copyright, 1921, by The Century Company Copyright, 1922, by Duffield and Company
Printed in U. S. A.
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