EF, Hungerford on Glacial action in the Green Mts. 3 
except the fine lines upon quartz, were found upon the sum- 
mit, although extended search was made for them, The pres- 
ervation of such furrows in the extremely friable rock must 
be rare, though they may yet be detected in the immediate 
vicinity of the summit on some freshly exposed surface. The 
rounding of the cliffs, upon the northern side of the final as- 
cent, within the above named distance of the highest point, is 
go conspicuous as to at once attract attention, The highest 
level at which distinct grooves were observed is judged to be 
about 700 feet below the summit, or nearly 3400 feet above 
the sea. At this point, in the bridle path which descends the 
northern or northeastern face of the mountain toward Rid-- 
ley’s Station,* in the Wooski Valley, the bearing of the 
grooves was N. 20° W. and again N. 40° W., the latter being 
on a side of rock and deflected. The ledge at this point was 
handsomely polished. The course of the moving ice on this 
its progress. 
The evidence of glacial motion afforded by the polished 
ated, the lines not having been so sharply cut, or not so well 
preserv But, in these also, the direction of the polishing 
motion is very readily detected from the general character 
iven to the surface by the minute gravings. In order to test 
this point, and to correct any possible influence of habit, or of 
prejudice in myself, I invited my host of the Mountain House, 
who was unacquainted with such observations, to determine 
independently the direction of the polishing force. His deter- 
mination coincided with my own. The directions as deter- 
mined oa the «mountain were marked upon the masses in 
pencil before-breaking them off from the rock, and the obser- 
vations confirmed by careful examinations athome. The lines 
we much more distinctly brought out by moistening the sur- 
© ‘The point on the Vermont Central B. B. from whieh theascntismede 
