[barnes-hayward- EXPANSIVE FORCE OF ICE 37 



mcleod] 



Observations made by the Authors upon the Ice in the Montreal Filtration 

 Chambers, 1914. 



In order to obtain some information on the expansion and con- 

 traction of a restricted field of ice, some observations were undertaken, 

 of the behaviour of the ice sheet which had formed in the North East 

 chamber or bay of the new Montreal Filtration Beds being constructed 





Figure 3. 



by one of the authors (N. McLeod). This chamber is fifty feet wide 

 and three hundred and fifty feet long. It is completely roofed with 

 the exception of a few man-holes, the roof being carried on concrete 

 pillars, thirty feet square, spaced nineteen feet apart. The North 

 and East sides are banked up outside with earth. The West side is 

 the division wall between this and the adjoining bay, and the South 

 end is open and faces a wide passage crossing the whole plant. The 



