Fig. 1, 



1500 







O^WH j 













1400 













1300 













1200 













1100 







■HI 







1000 















900 



g 











800 







^■IH 







700 



600 

 500 



22 BS 





















400 













300 













200 













100 



























10U 



20U 



3UU 



4UU 



5UU 



15U0 



'/UO 



LHA» 



I. Glass-hard English Cast Steel (tem- 

 pered at 100°), 



2a=10; 26=2; n=l 

 II. Soft Swedish Iron (annealed) : 

 2« = 126; 26=1-8; n=*. 



III. Cast Iron: 



2rt=12-6; 26 = 1-8; it = 4 - 



IV. Cast Cobalt: 



2fl = 10; 26 = 2; lt=£. 

 V. Hard-drawn pure Nickel : 

 2«=10; 26=2: n = J. 



