410 Messrs. Kei Iokibe and Sukeaki Sakai : Efect of 



platinum-rhodium, except when the temperature is very high, 

 in which condition the contrary is the case. 



AXIO* 

 120 



N> 

 IOO 6-6 



80 6-2 



€0 5-6 



40 54 



20 5-0 



O 4 



,'Cf H 



Fig. 



-Platinum. 



Fig. 8. — Platinum-rhodium. 



O 100 ZOO 300 400 500 600 7O0 800 



XXIO* 



140 



t2Q 



100 



hi) 

 BO 6-6 



SO 6-2 



40 5-8 



20 5 4 



O 5-0 













i 















f 









1 





i 

 1 





fO-" 









l/ 







N 







! ! 













si 















/ 

 / 













-*-* 



j 







IOO 200 300 4O0 SOO 600 700 



NXIO - 

 13-6 



13-2 



12-8 



120 



11-6 

 AXIO* 

 60 11-2 



40 IO-8 



20 10-4 



O io-o] 



IOO 200 3O0 4O0 500 600 



Fig. 10. -Nickel. 

 X : log. dec. 



TOO 200 300 400 



Fig. 9. — Tungsten. 



n : rigidity. 



5. Tungsten. Fig. 9. 



Tungsten wire was obtained from the Tokyo Electric Co., 

 and tested in a hard-drawn state. Since at high temper- 

 atures tungsten is easily oxidizable, it was experimented on 

 up to 200° C. With the rise of temperature the rigidity 



