een 
by ihe expansive power of freezing Water. 141. 
the outward expansion onits borders. When an egg is 
frozen, it bursts from the same cause, witha wide fissure. 
The same is true of trees, which in very severe weather 
sometimes burst with a loud report. Again, I have ob- 
served, that in large ponds and lakes where thick ice has 
been formed, a disruption, just at the edge, between the 
main body of the ice and the shore, has taken place, and 
that the ice has projected whan the shore a considerable 
distance over the line of disruption. In case this ice had 
formed upon a rock near the shore, the rock must have 
been carried with it in its expansion towards the shore, 
and must have been left in that situation at the melting of 
the ice. When the ice formed again, it would be carried 
further forward, and since in New-England the ice forms 
disruption,” and by your remarks on the phenomenon in No, III. of your 
ournal. In this instance, “the earth, to the ann it had frozen the past 
ine 
the fissure, having been forced up, srasianee the other, three 
ur correspondent Petros thinks it + yd agri a these ab ives = 
* ¥ 
be moved by ice, and asks with an air of triumph, how it can re 
rocks, and not others. I answer, that the poor a eae of re ic e will ane 
all the rocks which are within its reach, except those which are so firmly 
xed in round, tha’ from this cause, is greater 
than the force by which the ice attaches it! tself to the rocks ere such 
is the case, there will be a disruption be par — pouk towards the middle, 
iy eat, be driven upon or over 
the rock. - is effect | have often seen produced.” 
h 
reach of the ice in lakes s, been long since Rene Ges to the sh 
may be —s it is not without example, 
or old ones enlarged or diminished by ea 
