238 GEOLOGY. 
still alive and trying to suck a bit of apple paring. I then offered 
it some sugar and water on which it fed greedily, but the solution — 
being too strong stuck to its feet and in struggling it lost two of 
them. On the 30th the last fly came out a female, and then I 
determined to try how long I could keep her, making my sweet- 
ened water very weak. The first mentioned died on the 1th 
November, and the last on the 10th December being then forty 
days old, and I think might have lived longer but that in the mean 
time I had filled up my case with plants and as she persisted in 
keeping near the glass her wings were continually drenched by the 
moisture collected on it.—Lours Mircnetn, Norwich. — 
American Leecues.— Our fresh water leeches, neglected forso 
long, have at length received attention from Prof. Verrill, who con- 
tributes an illustrated article on them to the “ American Journal of 
Science” for February. About twenty-five species are enumerated, 
- most of them being new to science, one species ( Cystobranchus : 
viridus Verrill) lives in both fresh and salt water. Most of out — 
common leeches belong to Clepsine, and are found under sub- 
merged sticks, ete. and occasionally on the under side of turtles, 
but they seldom, if ever suck blood. They feed upon insect zor 
small worms, etc. 
GEOLOGY. 
A New Cave rm Berks County, PENNSYLVANIA, 
ered sometime last November and was explored to “a 
tent in February 1872. The above cave is now explored her a. 
length of about five hundred feet and in width nearly pe 
hundred feet in several apartments composed of Jimestoné ‘fd 
silicious rock. The stalactites and stalagmites are of 4 eer 
nature, some stalactites are nearly pure silica, some twelve = : iS 
teen inches in length and one and one-half inche 
was disco” ! 
some S 
s in thi 
and in one apartment all quartz crystals, some purple, 
Amethyst as can be. I intend to explore the whole am 
to find a “bone cave below, as the present floor, I am sure, 3 en | 
_ time dropped down and is now from twenty to twenty se me 
in depth. I expect to find an entrance to the lower bottom: pi 
temperature of the cave is from sixty to sixty-five w ban 
some apartments. I think the stalactites are purer ae ee a 
in the Mammoth Cave of Kentucky. The above cave 7 
sft 
