ROCKING-STONES. 
OO 
wonderful geological 
changes take place. 
Large rocks are pro¬ 
jected in the fall by 
the water freezing in 
the crevices, like the 
Mons Meg cannon-balls. 
Our old boat, the “For¬ 
lorn Hope,” the veteran 
of my Beecliy Island 
attempt, was stove in 
by one of these while 
drawn up under the cliffs 
of “ Ten-mile Goi'ge.” 
The rocks which fell 
in this manner upon the 
ice-belt were rapidly im¬ 
bedded by the action of 
the sun’s heat; and it 
happened frequently, of 
course, that one more re¬ 
cently disengaged would 
overlie another that had 
already sunk below the 
surface. This, as the 
ice-belt subsided in the 
gradual thaw, had given 
many examples of the 
rocking-stone. I have 
placed in the margin 
LIMESTONE ON MICA SLAlfc. 
GREENSTONE ON GNEISS. 
LIMESTONE ON GREENSTONE. 
GNEISS ON GREENSTONE. 
