THE NEW ASTRONOMY
THE NEW ASTRONOMY
BY
SAMUEL PIERPONT LANGLEY, Ph.D., LL.D.
DIRECTOR OF THE ALLEGHENY OBSERVATORY, MEMBER NATIONAL ACADEMY,
FELLOW ROYAL ASTRONOMICAL SOCIETY, ETC., ETC.
Illustrated
BOSTON.
TICKNOR AND COMPANY
211 Tremont Street
1888
Copyright, 1884, 1885, 1886, and 1887, by the Century Co.;
and 1887, by S. P. Langley.
All rights reserved.
University Press:
John Wilson and Son, Cambridge.