Teschemacher on Uranium. B S 
Ant, IV. — ON THE OCCURRENCE OF URANIUM IN THE BERYL 
LOCALITY AT ACWORTH, N. H. By J. E. TEscHEMACHER, 
In April, 1841, I read a paper before this ciety, an- 
nouncing the discovery of Uranium in the well known Tour- 
maline locality at Chesterfield, in this State; and that I had 
found it not. only among the Tourmalines, but also in the 
quartz which accompanied them. l 
Several boxes of minerals, from Acworth, New Hamp- 
shire, the celebrated locality of the enormous beryls, having 
recently arrived here, they were submitted to me for examina- 
on. i 
Acworth is about one hundred miles, in a north-easterly 
direction, from Chesterfield. 
In these boxes were several of the large blue beryls, many 
of a pure white, from translucent to opake, and a few of a 
beautiful bright yellow color, varying in the same specimen 
from clear transparent to perfect opacity. 
These last were nearly all imbedded in a dark, smoky 
quartz, perfectly resembling that at Chesterfield, and like it 
splintery, from the immense pressure to which it had been 
subjected, and which has so much injured the beauty of the 
accompanying beryls. : 
On breaking several of these specimens of quartz I was 
much pleased to find the uranium mineral, precisely of the 
ne appearance as that at Chesterfield, in small green-yellow 
Cubical Plates, and in one piece there was a considerable 
quantity of the yellow pulverulent oxide. I beg to present 
two specimens for the collection of the Society ; the uranium 
on them is not very abundant, although sufficient to shew its 
existence, ` 
This locality not being mentioned in either of the recent 
UPcations in this country on Mineralogy, by Alger and 
Dana, I presume this mineral has not hitherto been observed 
