160 G. H. Perkins on a recent Land-slide in New Hampshire. 
stripped of surface material. Only in two places, both small 
in extent, was the rock foundation of the mountain exposed. 
One of these was at the top where the slide seemed to have 
started from a ledge, the other was a little less than half-way 
down, and reached entirely across the track of the slide. 
With these exceptions the whole surface was covered with a 
loose, coarse sand or gravel, consisting entirely of comminuted 
rock, increasing in depth from top to bottom and very loosely 
compacted. The thickness of this loose material was shown 
along the sides of several small streams that were running 
down the slide, which, at the time of our visit, the 20th of 
October, had cut entirely through it, and ran over the solid 
rock beneath. Near the top the ground was moist but there 
Were no streams; these 
down. At the top of the slide, the surface sand was only a 
slide, ee ground by it from larger rocks ; and how much 
and in one place the syenite was ¢: by trap dikes, fr 
an inch to a foot in thickness. Some of these dikes forked 
times, others crossed each other in the form of a letter 
X, and some varied greatly in thickness along their course. A 
few broken crystals of rose-purple quartz, an inch or more it 
diameter, were found among the débris. But the only rock ia 
place along the course of the slide was the syenite. 
Sea surface of this loose, sandy 
