HELIOGRAPHIC POSITIONS 
OF SUN-SPOTS 
OBSERVED AT HAMILTON COLLEGE 
FROM 1860 TO 1870 
BY 
DR. C. H. F. PETERS 
Professor of Astronomy and Director of Litchfield Observatory 
EDITED FOR PUBLICATION 
BY 
EDWIN B. FROST 
WASHINGTON, D. C. : 
PUBLISHED BY THE CARNEGIE INSTITUTION OF WASHINGTON 
r 
I 9°7 
