92 



THE ROYAL SOCIETY OF CANADA 



9,000 lbs. Straight vertical lines showing. 

 15,400 lbs. First significant vertical crack 

 65,500 lbs. Ultimate load. 



65,500 



Ultimate strength = 



= 376 lbs. per sq. inch. 



12 X 14-5 



Before breaking, a considerable distortion in shape was apparent, 

 as shown in Fig. 5. 



N.B. Temp, of storage — 2°C. 



Temp, of Laboratory 20°C. (approx.). 



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