306 Scientyfic Intelligence. 
times it generally burst the tube in which it was frozen. On look- 
ing for an explanation of this phenomenon, it became at once 
evident that the experiment contained the germ of the explanation 
of glacier motion. Every time the water was frozen in the tube 
there was a mimic representation of glacier motion. The ice pos- 
sessed, the first two or three times it was frozen, a certain amount 
only been frozen once differ from the other? The answer to this 
e 
stance, though pure ice is not. The first question then to be asked 
18, 18 lee with air in it a viscous substance? In order to get an 
the same as glacier ice; other ice m a ? 
close imitation of glacier ice as possible, which was done by plac- 
fi 
were filled, as much pressure being applied as possible to the snow 
to drive out the water. The tubes were then placed for some time 
in the freezing mixt The ice beams were afterward withdrawn 
from the tubes and placed on the supports, and a weight of one 
pound hung from the ¢ The bea ow-ice so made 
= . 
bent one inch in five minutes. Temperature seemed to have some 
