Astronomy. 433 
mets to the bottom of the photosphere.” In these observations 
nL hich we may 
hope to base a more complete theory of the constitution of the 
galvanometer. The one conclusion at which he arrived was, 
the full Moon, at Paris and in the summer months, gave as much 
heat to his pile as a radiating surface 6°5 centimeters square, main- 
tained at boiling-water Semmgereiure and placed at a distance of 
= : 
We are not informed. He confirms Lor 
ion of solar to lunar radiation is about as 80000 to 1, and 
27 
