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NOTE: degrees A (Absolute?) is the same as the current degrees K (Kelvin).

THE POPULAR SCIENCE MONTHLY VOLUME LXXXVI JULY TO SEPTEMBER, 1915

THE SCIENTIFIC MONTHLY VOLUME I OCTOBER TO DECEMBER, 1915

EDITED BY J. McKEEN CATTELL

THE SCIENTIFIC MONTHLY ——— OCTOBER, 1915 ——————-

THE EVOLUTION OF THE STARS AND THE FORMATION OF THE EARTH. II

BY DR. WILLIAM WALLACE CAMPBELL
DIRECTOR OF THE LICK OBSERVATORY, UNIVERSITY OF CALIFORNIA
THE PRINCIPLES OF SPECTROSCOPY