12 Scientific Intelligence. 
have our Statington and other roofing slate quarries; and no tra 
is known in the neighborhood, and no reason can be cast for 
of Peachbottom. But this belt is a number of miles long, and I 
can see no wmboriens 2 connection between the trap at one end of it 
and its metamo 
Professor  aeeap ne els sure that the roofing slates are part and 
parcel of the chlorite slate formation which makes such a show 
r 
satisfactory yet. Mr. C. E. Hall is disposed more and more to 
m them as re. ill (Hudson River) metam 
along t the Chester county “South valley” hill, and across "the 
Schuylkill into Philadelphia and perio Trenton. 
verything points toward no -conformable basins or me 
8 e heart o 
2, Pe aaiMauid Second Geological Survey. Harrisburg, 1879 
(1) Second Report of Progress in the oe Arne of the Survey 
arrisburg, by ANDREW S. McCrgatru, MM. 438 pp. 8vo. 
(2) The Geology of Lawrence & Cownty, and a Special Report 
on the Condition of the cae asures in Western Pennsylvania 
and Eastern Ohio, by J.C. W ‘HITE, QQ. 336 pp. 8vo, with a 
These sidan. ee the series of volumes of Pennsylvania 
Reports, already numerous, show efficient action in both the head 
of the Survey and the corps who are at work with him. The first 
of these Reports, while mostly the work of Mr. McCreath, includes 
