1894.] NATURAL SCIENCES OF PHII.ADELPHIA. 459 



to be. Very close to this are two depressions out of which soapstone 

 is reported to have been quarried. Mr. Wilson informed me that 

 basins of Indian manufacture were found here in comparative 

 abundance. 



At the school a public road runs nearly east. Along this, on both 

 sides for a quarter of a mile, and then on the north side the steatitic 

 and serpentine rocks abound, but none were seen certainly in place. 

 With these was much gneissoid rock and rusty quartz, also in loose 

 masses. A mile east of this a large mass of steatite is visible in 

 the road, and I am informed that it occurs a half mile farther east 

 on the Limestone road, the dividing line between the townships of 

 Sadsbury and West Sadsbury.' 



Between a quarter and a half mile north of the steatite the older 

 gneiss is visible in a road running north between two branches of the 

 Octorara. 



The fourth and westernmost of the southerly outcrops is the one 

 which has furnished probably the greatest variety and number of 

 specimens of Indian handiwork, their quarries being still partially 

 visible. It is situated on the farm of George Williams, in Sadsbury 

 Township, Lancaster County, about one mile west of Christiaha, 

 and three miles S. 70 W. from the Swan outcrop. The only ad- 

 jacent rock visible is a feldspathic gneiss of the Chester County 

 variety. This is shown in numerous loose masses in a line nearly 

 northeast from the steatite outcrop. The steatite is strewn in frag- 

 ments, some of them quite large, over an area of several acres, and 

 there are two places where quarries evidently existed but which have 

 been used as dumping grounds for the adjacent rock. In these, I am 

 informed, the rock in place was exposed. 



The steatite from all these localities is much alike, generally schis- 

 tose, quite soft, though impure and containing a large number of 

 small cavities as if from the weathering out of a contained mineral. 

 No crystalline form was observed in the cavities, they often contain 

 ferric oxide. The particles of talc are usually comparatively large 

 and irregular, making the rock, on a casual inspection, resemble a 

 mica schist more than the talc schists of the Lafayette steatite. The 

 color is usually dull gray, more rarely greenish. Except at the 

 Swan outcrop it is not visibly accompanied by serpentine. At 



'' West Sadsbury was set ofiF from Sadsbury in 1878. The dividing line is the 

 Limestone road, an old Indian trail and an important highway, which is the west 

 line of the borough of Parkesburg. 



