ON AURORAL DRAPERIES AND ON THE SIGN 
OF THE AURORA CORPUSCLES 
A SHORT REPLY TO PROFESSOR BIRKELAND 
bY 
CARL STORMER 
(VIDENSKAPSSELSKAPETS SKRIFTER. I, Mat.-Naturv. KLASSE. 1917. No. 3) 
UTGIT FOR FRIDTJOF NANSENS FOND 
CHRISTIANIA 
AT COMMISSION BY JACOB DYBWAD 
1917 
