Editorial < 'omment. 1 1 3 
from the parent ledges of rocks in Canada like the Ohio drift 
specimens. One boulder of the jasper conglomerate before 
mentioned, which had been carried by the ice-sheet from 
north of lake Huron across < )hio to the edge of Kentucky south 
of Cincinnati, was in this collection, being the same that is 
shown in the engraving from a photograph on page 63 of 
Prof. Wright's recent book, "Man and the Glacial Period." 
This boulder is three feet in diameter and weighs 4.000 
pounds. About forty varieties of rocks found in the vicinity 
of Oberlin were shown as matched with rocks outcropping in 
Canada, some of these determinations being by Dr. Robert 
Bell. A duplicate set of these matched boulders and Cana- 
dian rocks was also in the Smithsonian collection in the Gov- 
ernment building. 
The largest mass in this exhibit was a striated slab of the 
Berea sandstone from Amherst. Ohio, measuring live by nine 
feet, being the same which is shown in illustrations of page 
164 in Prof. Chamberlin's memoir on "The Rock Scorings of 
the Great Ice Invasions.*' in the Seventh Annual Report of 
the U. S. Geological Survey, and on page >">2 of Prof. Wright's 
hook previously noted. Another and very unusual phase of 
glaciation exhibited here was the remarkably fluted surface 
of the Corniferous limestone from Kelley's island in lake Erie, 
as illustrated in the same volumes and in Prof. Wright's ear- 
lier and larger work on "The Lee Age in North America." 
Portions of gravel and sand beds from the glacial plain at 
Newcomers town, Ohio, in which Mr. W. 0. Mills found a 
palaeolithic implement, wen- exhibited, having been removed 
and placed in boxes with glass sides, without destroying the 
original stratification. On the walls of the space allotted to 
this collection were photographs of this pah-eolith and of oth- 
ers from other localities of Ohio, Indiana. New Jersey and the 
Somme valley in France: and two large maps, drafted by Mr. 
Warren Uphani, presented the leading facts connected with 
the Glacial period of North America. One of these maps was 
limited to Ohio and the country immediately adjoining, with 
the courses of the ret reatal moraines of the ice- sheet as mapped 
by Mi - . Leverett, the ancient beaches of the glacial lake War 
ren south of lake Erie, and altitudes of many towns through- 
out the state. The other map included all the glaciated 
