Geology and Natural History. 71 
The different objects found in this cave are of great interest, as 
they apparently run counter to the somewhat hard and fast lines 
which have been drawn as to different well marked periods in the 
early history of man.—~ Nature, May 30. 
3. Pseudomorphs of Serpentine with the form of Staurolite ; 
T. D. Ranv (Proc. Acad. Nat. Sci. Philad., 1871).—At the line 
between Philadelphia and Montgomery counties, the well-known 
steatite bed, beginning on the west side of Chestnut Hill, about 
three miles distant, crosses the Schuykill and continues in a nearly 
southwest by south direction (exactly 8. 54 W.), beyond that river 
about two miles and a half, where it crosses the valley of Mill 
Creek, and ends, or sinks beneath the surface. Perhaps the most 
rate. 
‘ one place hereafter mentioned, seem to weather so much alike 
at no clue to the form can thus be 
fe unnerite. 
n the northeast side of Mill Creek, a portion of the rock in 
Ke surface, the steatite 
d bri 
ng cavernous and decom soft and brittle, 
rae to be other than matrices of crystals, while in two cases 
+ uct cruciform cavities with angles of about 60° were observec 
portions of rock containing these were cut out, and in 
