11:* The American Geologist. February, 1894 
ing the city. Mr. Guthrie, in his further, search for boulders 
of Canadian origin, has traversed large portions of Illinois. 
Indiana and Michigan, and his collection illustrates the dis- 
persal of the drift from the region north of the Laurentian 
lake- over the country southward. 
A peculiar conglomerate enclosing fragments of red jasper, 
occurring in ledges north of lake Huron, from near Algoma 
and Thessalon westward to the cast end of lake Superior, is 
found to be distributed by the currents of the ice-sheet upon 
the region from Cleveland and Cincinnati west to Alton and 
tiic Illinois and Kankakee rivers: but none, according to Mr. 
Guthrie, can be found at Chicago, and it is rare even along 
the cast coast of lake Michigan, although plentiful through 
the greater part of the lower peninsula of Michigan. Boul- 
dersofvery coarse agglomerate in this collection, identified by 
Dr. Robert Bell, of the Canadian Geological survey, as from 
the district north of lake Huron, were found in the till 700 
miles distant, at Alton, Illinois. Pieces of native copper, de- 
rived from the lake Superior district, well represented in Mr. 
Guthrie's- collection, occur in the drift in and near Chicago 
and southwestward to Joliet and La Salle, a mass of 168 
pounds having been found a half mile east of the state prison 
at Joliet. During the maximum stage of the glaciation drift 
was transported, as these erratics show, from lake Huron far 
to the south and southeast, and 'from lake Superior to the 
south and southwest. Glacial stria' on the bed rocks, admira- 
bly exhibited near Chicago and thoughout the greater part of 
the drift-bearing region wherever the rocks are exposed, 
partly record these currents ; hut in many places the stria-, 
like the moraines, belong to later stages of the glaciation, 
when the ice currents, during the recession of the continental 
glacier, were deflected toward the embayments and re-entrant 
angles then formed by its irregularly wasting border. 
Glacial Drift and Traces of Glacial Man in Ohio. 
In the Ohio department of the Anthropological building, 
Prof. (i. Frederick Wright, of Oberlin, Ohio, with the assist- 
ance of Mr. I). ('. Baldwin, of Elvria. and others, exhibited a 
collection of striated slabs from the bed rocks, and boulders 
and striated stones from the drift of the state, with samples 
