re ‘tae ~~ i : 
Prof. E. Loomis on the Aurora of 1859. 71 
may hence conclude that the repulsion exerted by the sun, and 
also by the nucleus, is not a property belonging to all the particles of 
the mass, like the attraction of gravitation. It is probable there- 
fore, that it is either a magnetic, or an electric force, emanating 
from the surface of the body, or from a portion only of its mass. 
Yale College, May 10th, 1861. 
(Zo be continued.) 
Art. XIL—The Great Auroral Exhibition of Aug. 28th to Sept. 
4th, 1859.—77H aRtIcLE; by Ex1as Loomis, Professor of 
Natural Philosophy and Astronomy in Yale College. 
Stxce the publication of my last auroral article I haye ob- 
tained some additional information, chiefly collected during a 
recent visit to Europe. 
1. Observations at Highland, Illinois, (lat. 38° 43’, long. 89° 48’ W.), 
by A. F, Banpeurer, Jr. 
g 
the latter I saw plainly « Aurigae rise without much diminution of 
brightness. 
At l o'clock. « quantity of rays shot upwards from the = oe! 
; i 1 ; 
At4a.m. both still stood on the northern horizon. The greatest 
height of the arch during the whole apparition was 60°, that of the seg- 
ment was 20° to 25°. 
