184 



ROYAL SOCnKTV OK CANADA 



Alitminiim. 



'I'lu> sprcimcii w;is :i loiii^lli oT onlinar) aluminum wire such aa is 

 used lor commercial purpoisea. 



6f- 



I'a 



X 

 H. 



^ 6 



13. l6 20 2* 



INCRK/*SC PVR CCNT RCSISTRttlCK . 



at 



Fm H. 



As thio poieutiial leads could not be soldered to the wire, thoy had 

 to be seeureil by winduig- them arouud the wnv and covering the joint 

 by a globule of Ihard brittle wax. 



