422 APPLICABILITY OF OXTR EDUCATIONAL SYSTEM. 



Auother instance of ice expanding towards the line of least resist- 

 ance may be cited : — When Presque Isle Harbour is entirely frozen 

 over, any expansion of the ice is apparant by its encroachment on the 

 shore. But when the bay is but partially frozen over the expansion is 

 towards the open water, and is not visible on the shores. 



In conclusion, I would mention another circumstance that occurs 

 during the expansion of ice. It is observed, that when a large extent 

 of field ice expands towards the shore it does not shove into deep bays 

 but fractures from point to point, in a zig-zag manner, across the chord 

 at the mouth. The thrust of the main field must find less resistance 

 across this chord than around the area of the bay. 



Ice is a most delicate thermometer, and from the brief statement of 

 facts connected with its phenomena the following general inferences 

 may be derived : 



1st. That ice is capable of expansion and contraction . 



2nd. That ice (up to 32°) expands with a temperature higher than 

 that which had just previously existed. 



3rd. That ice contracts with a temperature lower than that which 

 had just previously existed. 



4th. That ice does not expand or contract with a uniform 

 temperature. 



5th. That ice is susceptible of expansion to a much greater extent 

 than of contraction. 



6th. That when ice is equally dense, thick, and glare, and equally 

 acted on by a heated atmosphere, it expands from the centre towards 

 the circumference. 



7th. That ice expands towards the line of least resistance. 



THE APPLICABILITY OF OUR EDUCATIONAL SYSTEM 

 TO THE SOCIAL CONDITION OF LARGE CITIES. 



BY THOMAS HENNING. 



Head before the Canadian Institute, 27th March, 1858. 



Education is a subject so fraught with interest and of such vital 

 importance to the well-being of society, as to justify any inquiry likely 



