Specific Charge of the Ions emitted by Hot Bodies. 557 

 Nichrome. Positive Ions. 



z. 



H. V. ' ,. 



e/m. 



•563 

 •563 

 •563 

 •563 



4850 

 4850 

 4850 

 4850 



122 1-575 

 160 1-475 

 200 1-30 

 122 1-725 



233 

 268 

 273 



280 



Average values ... e/ra=264, Correcterl ... e/m =420. 

 m/B.- 36-6, m/H= 23. 



Summary. 



In order to see at a glance the results which have been 

 obtained, the corrected values of e\m and o£ w/H are collected 

 together in the following table. Where the substance gave 

 more than one value of e\m and m/H the abnormal values 

 are also shown in the first two columns marked " initial 

 values." The term initial value seems strictly applicable in 

 the case of gold, and probably also tantalum, but in the case 

 of iron we are not sure that the high values of e\m were 

 really initial values. With this metal, the values obtained 

 seemed to depend more on the specimen used than any other 

 factor that we could discover. In the case of tungsten the 

 values are so erratic that we have made no attempt to dis- 

 tinguish between them, although there was some slight 

 indication of an approach towards higher values of e\m with 

 continued heating. The last two values for platinum and 

 the carbon are taken from the previous paper. 



Substance. 



Initial 

 value of e/m. 



Initial 

 value of m/H. 



Permanent 

 value of e/m. 



Permanent 

 value of m/K. 



Platinum 



22*i* 



775 

 199 

 246 



:::::: 

 



43 : 7 

 12-5 



48-4 

 393 







387 

 337 

 366 

 342 

 380 

 420 

 445 

 486 

 400 



"358 

 343 

 420 

 384 

 353 



25-0 

 28-7 

 20 4 

 28-3 

 25-4 

 23-0 

 21-7 

 199 

 24"2 



270 



28-1 

 23 



25 7 

 27-6 



Palladium 





Silver 



Nickel 



Osmium 



Gold 





Tantalum 



Tungsten 



Brass 



Steel 





Platinum 



Carbon 





