* 
88 Teschemacher on Uranium. 
there, which surprises me, as the spot has no doubt been 
many times examined. 
I think it not at all improbable that the fine deep yellow 
color of the beryl, imbedded in the quartz, may be owing to 
an admixture of uranium, but I have not yet had an oppor- 
tunity of trying it. 
One chief object, however, of this communication, is to 
point out this occurrence of uranium of the same appearance, 
and under the same. circumstances, as a fact which with 
others connects these two localities geologically. 
Professor Hitchcock, in his last able Report on the Geology 
of Massachusetts, states the Chesterfield locality of Tourma- 
line to be an enormous vein of granite in mica slate, which 
is the character of that region, nearly corresponding with the 
direction of the layers of the slate. This vein of granite is 
crossed obliquely by a vein from six to eighteen inches in 
width, containing the red and green Tourmaline, Albite, 
quartz, &c., or rather the quartz forms the central part of 
this vein, the Albite lying on each side of it, and the Tour- 
malines passing through both. The beryl locality at Ac 
worth, is a vein of coarse granite, passing through the gneiss 
which prevails in that part of the country. These then, are 
clearly intrusions of matter from below, and the character 
and actual appearance of the intruded crystalline rocks show 
clearly an action under tremendous pressure ; while the simi- 
larity of the rocks renders it highly probable that this action 
took place at the same time in both localities. Now, alt 
one hundred miles is but a very short distance for such ac 
tion, yet it may be considered as one link in a long chain, 8 
portion of a line in a delineation of direction, to guide n - 
incite students to further and closer examination. 
The whole of this region contains beryls, dispersed in va- 
rious localities, but these beryls have clearly been formed and 
crystallized under different circumstances, and perhaps have 
undergone action, whatever it may be, at different epoch : 
m the beryls of Siberia, or from those of various 
in South America. 
