On the Magnetic Susceptibility of Liquid Oxygen. 



Magnetic Susceptibility of Water. 

 I, with silver ball ( ^sceptibility of ball = -1'73 x 10-. 



Tt/Vli-i-mn nf I!! 1O-'7 h 7^ n n, 



321 



I volume of ball = 12775 c.c. 



II, with glass ball, No. 3 ( s ce P til f ^ of bal] = ~^ * 



I volume of ball = 1O3427 c.c. ' 



The absolute susceptibility of water is, therefore, 

 -(173-0'88)10- 6 = -0-85 xlO- 8 



and (173 0'94)10- 6 = 079 X 10~ 6 from the experiments with 

 the silver ball; and -(0'333 + 0*253) 10~ 6 = 0'59 X 10~ 6 from the 

 experiments with the glass ball No. 3. The mean of these values 

 gives 074xlO~ 6 as the absolute susceptibility of water. The 

 following are some of the values obtained for the magnetic suscepti- 

 bility of water by older and by more recent observers. 



Yalue of 

 Observer. Jc 10~ 6 for water. 



Faraday O72 



E. Becquerel O67 



P. Curie 079 



Townsend 0*77 



Quincke O81 



Du Bois 0-84 



Mean value = 077 



Hence our value for water 0*74 = H0~ 6 is not far from the mean 

 of the above results. 



Many other experiments were then made with various solutions 

 of salts of iron and manganese, which satisfied us that we could 

 place reliance upon the results of this method in measuring the 

 magnetic susceptibility of a liquid, and we then proceeded to 

 experiments with liquid oxygen. 



