THE ROYAL SOCIETY OF CANADA 



CONCLUSIONS. 



It appears to us in consideration of all the tests, that the crushing 

 strength of ice shows considerable variation depending on the physical 

 condition of the ice. In the larger blocks the strength is likely to 

 be less owing to the greater probability of the existence of faults. 

 Very small blocks will probably show much greater pressures. 



Results as high as 1,000 pounds per square inch have been given 

 by some observers; but we believe such large pressures are obtained 

 only on small blocks from | to 2 inches. 



In computing the value of the crushing strength for use as a 

 factor in engineering construction, we see no reason at present to 

 change the figure already accepted by many Engineers, i.e., 400 lbs. 

 per square inch. 



Ice Crushing Tests, March 5th, 1915. 



Block No. 1 



Dimensions as in Fig. 1. 



