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ROYAL SOCIETY OF CANADA 



cient was not kno\vn, and a special determination of it was necessary. 

 It was found that the increase of resistance caused by elevation of tem- 

 perature was very steady, varying directly as the tempreature with co- 

 efficient + .000246 per 1° C. 



k 

 •1 /-a 



INCHEASe PER CCNT STf^CTCM 



Fig 6. 



The load was varied from 515 gms. to 25,722 gms., when the wire 

 broke. The corresponding stretch per cent, varied from to 1.007, and 

 the specihc resistance from .00004928 to .00004925. Fig. 6 shows the 

 result. 



