314 Scientific Intelligence. 
one else. The matter has long excited my attention, the entire 
inadequacy of the older views having forced itself upon me when 
first engaged in field-work in Wisconsin. 
However, though cheerfully acknowledging the priority of 
IPs vi 
the Green Bay Valley and Lake Superior. The crystalline rock 
region is no such lofty one as he appears to suppose, is mnie 
; but, because of ; 
size and force, and of their westerly direction, they left the region 
farther south untouched. ‘ 
_ Professor Winchell’s view was reached by noticing the relation 
in position of the driftless region and the area of crystalline 
Wisconsin. At the time that I wrote, the proofs of a’similar state 
of affairs for the Lake Superior country were nearly as good, and 
be seen when the reports on that country 
come to be published. 
University of Wisconsin, February 18, 1878. 
2. Second Geological Survey of Pennsylvania. : 
(1) Report of Progress in the Fayette and Westmoreland district 
of the Bituminous Coal Fields of We nsylvania ; by 
: Western Pen 
J.J. Srevensoy. Part 1, Eastern Allegheny County and Fayette 
