n 



it cut the fo tead of turning it into 



turn it into a square (Fig. 1 1), lay a copper lead on 



and you cannot get more than 40 to 45* indicated upon 



the galvanom : Laj a second lead in connection with 



the first one at b % and you obtain 49" galvr. Lay a third one, 



n connection, on at r, and 54* galvr. is the result. 

 These experiments an- AC do not un 



stand the- reasons of the results yet, and we must do so to 

 uiidr u- into luithrr knowledge. It must be pointed out 

 t hat the connections arc in close contact, the resistance 



is 90 tremendously increased that for any commercial purpose 

 the s\ absolutely valueless. \Ve u ill, therefore, turn 



and rxjKrinunt upon some of the older form of Thermo- 

 pics, and see what can be learnt from them. 



Flj 



