46 THE ROYAL SOCIETY OF CANADA 



TABLE IV. 



Results of Tension Tests of Ice 



No. of Breaking Load in 

 tests. pounds per sq. inch. 



1. 82 



15. °F Cut from ice. 



15.F Water frozen in 



cement moulds. 



" Cut from ice. 



Average tensile strength, 120 pounds. 



It will be seen that these are all considerably below half the 

 crushing strength. Mr. Bell in describing the effect of ice thrust 

 writes as follows: — 



