116 Adams and Coher — Elastic Constants of Hocks. 



9000 



7000 



5000 



3000 



1000 













y/\\ 







^L 

























































40 



80 



120 



160 200 240 



STRAIN 



280 



320 



360 



Fig. 8. Westerly granite, stress strain curves. 



9000 



/ooo 



40 80 120 160 200 240 280 



S TRAIN 



Fig. 9. Peterhead granite, stress strain curves. 



320 



9000 



. 7000 

 CO 



$5000 





 -J 



30O0 













r& 



/I 













































1000 _. 



40 80 120 160 200 240 280 



S TRA IN 



Fig. 10. Montreal nepheline syenite, stress strain curves. 



