ee. TS 
a source of amusemen: 
64 _G.J. Brush’s Mineralogical Notices. 
usual experiments on electric light, were repeatedly exhibited as 
t. 
i 
Arr. VII.—Mineralogical Notices ; by Prof. Gzorcr J. Brusu, 
= of the Yale Scientific School. | 
1. Gieseckite ? 
ocality several months every year. It occurs in 
from a quarter of an inch to two and a half inches 
“y are six-sided, and are terminated by 
prism; ; y, however, the basal 
8) 
