100 E. Andrews—Glacial Markings of unusual forms. 
of giant grooves, some of which reach a depth of six feet, and 
are twenty feet across. These markings run southward, round- 
ing slightly over the summit of the range and down its slopes, 
until they reach the crests of its southern precipices where they 
terminate abruptly, as it were, sailing away into the air and 
not forming any grooves down its face. 
Sixty miles southeast of the Cloche gap and off the mouth 
of French River, there lies, outside of the general insular belt, 
a beautiful cluster of wooded i slets, the Bustard Isles. e 
group consists of about two binditiend great roches moutonneés, 
upon which sufficient vegetable mold has accumulated to sup- 
port a thick growth of trees. Wherever a Ae has been 
washed away ‘by the waves the strize come to v 
Fig. 2 was se aeshed from 
a sample of curved markings 
near one of my camps on 
the north side of the group. 
The sketch represents about 
fifteen feet of the length of 
inence of rock in the direc- 
tion of X to turn the ice. In fact the islet was highest on the 
side toward which the ice turned at the first not fh The 
compass mark is oe but not precisely co 
Fig. 3 is copied from my notes of observation on strise ion’ 
at Negaunee, in ‘ahiaed Michigan. A knob of rock uncov- 
ered by iron miners was of such material that it showed on its 
irregular surface the finest markings, even to hair lines. There 
