of Palladium caused by Absorbed IJydrogei 



IV,) 



the susceptibility -gradient independent of the field H ? 

 (2) Is it independent of the hydrogen-contents t^, v 2 ? 

 Both these questions seem to receive an affirmative answer, 

 as far as the accuracy of the experiment goes. The Tables 

 summarize the results. 



H 



in gauss. 



-10 S K 

 1C« K m (Pd) 



1040 



1905 



28C7 



7-40 



7-48 



7-70 



5-60 



5-42 



5-34 



3519 



7-67 

 5-29 



Susceptibility-gradient due to absorbed hydrogen for various 

 strengths of field. Hydrogen-content ; — 

 550 X volume of palladium 

 to 4x „ „ 



Susceptibility of palladium. 





Vol. of hydrogen 











vol. of Pel. 

 vjv 



770 







550 



ttlO 



227 



vjv 



° 



550 











-10*K„ 



7*1 



7-01 



7-S8 



7-92 



Susceptibility -gradient due to absorbed hydrogen for various 



hydrogen-contents. 



H= 1303 gauss. 



The volumes i? l3 v 2 are not accurately known, as is their 

 difference, but the values given serve to indicate the ranges 

 over which the observations were taken. Incidentally the 

 susceptibility of uncharged palladium was found, the values 

 agreeing with previous determinations. It may be noted 

 that the irregular variations observed by Curie (2) in the 

 product KT (where T is the absolute temperature) might 

 possibly be accounted for by supposing that the palladium, 

 which was placed in a closed vessel, gave off and re-absorbed 

 traces of hydrogen when the temperature was raised, but it 

 seems more likely that they are due to slow reduction of 

 iron impurity and subsequent re-oxidation, since similar 

 irregularities were observed by Honda (3) in the case of 

 impure palladium, but not in the case of a very pure sample. 



