50 David Milne-Home on Ancient Glaciers. 
I found an oblong plateau of rock about half a mile long by a 
few hundred yards wide, flattened and smoothed most singu- 
larly. Had been advised by Professor Favre of Geneva to 
visit this spot, and was amply rewarded. 
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The rocks here of soft schist, the strata running vertically 
about N.E. by compass. In many places they are flattened 
and smoothed over extensive areas, of which advantage is 
taken for the erection at these places of cottages—the floors 
consisting of these smoothed rocks. The rocks, besides being 
smoothed, are occasionally marked by deep grooves or furrows, 
and also by sharp ruts or scratches, all parallel, and running 
N. and S. by compass—intersecting, therefore, the edges of 
strata. The grooves or furrows extend continuously some- 
times 30 or 40 feet—the scratches 6 or 8 feet. Some of 
former I measured, and found to be 2 or 3 inches deep, and 
5 or 6 inches wide. 
Noticed particularly that in some places these furrows or 
grooves interrupted by veins of hard quartz, in the schist 
rocks. The agent which had ground down the schist had 
been unable to make any impression on the quartz. At these 
veins, accordingly, the furrows stopped, and always on south 
: 
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