1882. 183 Trans. N. VY. Ac. Scz. 
was inthe mud and clay in the bottom of the pocket that all the 
crystals subsequently found were discovered. Only at the very bot- 
tom were the walls found “in situ.” This pocket differed in no re- 
spect from those commonly occurring in this region. They are all 
shrinkage fissures, situated in a counter direction to the strata, of very 
limited extent, and nearly perpendicular in position. The country rock 
is gneiss, trending N. N. W. and S.S.E., with a dip nearly vertical. 
A thick layer of soil everywhere mantles and conceals it from view. 
Three days of careful work, by our most trustworthy and painstaking 
miner, were spent in exhausting this pocket. 
No mineraiogist could have been more careful in preserving the an- 
gles and edges of the crystals than was this miner. Not one crystal 
of the hundreds taken out was in any way injured. 
Over four hundred pounds of chozce quartz crystals were obtained 
from this one pocket, besides the nine emeralds previously spoken ot 
and exhibited before this Academy. Of good, bad, and indifferent, there 
was found in all nearly half a ton. 
It was noticed that all the crystals that had been directly attached 
to the walls were semi-transparent and without any great development 
of the prismatic faces; while, implanted upon them, were crystals of 
great beauty and transparency, varying from citrine-yellow to dark 
chocolate-brown in color, and for the most part perfect in form. Two- 
thirds of them were perfectly terminated at both extremities and with 
considerable prismatic development. It was these latter that contained 
the fluid-inclusions. 
Large plates of rosetted mica were quite commen, and on them 
were implanted small crystals of rutile and of quartz, in rare perfec- 
tion. It is to these smoky crystals, found in this pocket, that I now 
ask your attention. When the smoky crystals were first found, they 
were noticed to contain many cavities seemingly filled with a very clear 
and lustrous fluid. Though no bubbles of air (or gas) were observed to 
‘move in these cavities at that time, yet I knew these crystals to be the 
so-called “ water crystals” of mineralogists. 
I take pleasure in recording the remarkable size and quantity of the 
cavities enclosed in these crystals. The longest cavity noticed was 
nearly wo and one half inches tong and one quarter of an inch wide. 
Cavities of one inch were not uncommon, while those of one quarter 
inch and less were, in truth, without number. 
Many of the crystals seemed to be made up almost wholly of cavi- 
ties, whose walls were barely thick enough to keep them separated. 
Many hundred, plainly visible to the unaided eye, could have been 
counted in a single crystal. 
For some time after these crystals were removed from the pocket, no 
