476 Mr. S. Bidwell. On the Effect of Tension [Apr. 24, 





Table III.— Nickel. 







Contractions in ten-millionths of length in fields of 



Load in kilos, per 

 sq. cm. 









125 units. 



185 units. 



360 units. 





 420 



172 

 162 



200 

 209 



242 

 287 



700 

 980 



156 

 122 



221 

 195 



315 

 334 



1400 

 1890 

 2310 



56 

 30 

 17 



109 

 66 

 43 



242 

 165 

 136 



Table IV.— Cobalt. 



Magnetic 

 field in C.GhS. 

 units. 



Contractions in ten-millionths of leng 

 sq. cm. of 



th with loads per 



75 kilos. 



344 kilos. 



772 kilos. 



22 















34 



0-5 



0-5 



0-5 



47 



05 





0-5 



50 





0-5 





84 



15 



2 



35 



98 



3 



2 



3 5 



125 



4-5 



3 5 



6 



156 



6 



7 



10 



219 



13 



15 



15 -5 



369 



28 



28 



29 



438 



38 5 



39 



36 



490 





41 





493 



38* 







500 







39 5 



