PHILOSOPHICAL SOCIETY OF WASHINGTON 
BULLETIN, Vol. XV, pp. 75-101 
ON THE TEMPERATURE AND 
STRUCTURE OF THE SUN 
BY 
O. LUMMER 
Address 
Delivered by Invitation before 
of Washington, March 
tile Philosophical 
21, 1907 
.Society 
WASHINGTON 
PUBLISHED BY THE S(>( IETY 
May, 1908 
