330 Mr. Take Sone on the Magnetic Susceptibilities 



Two sets of such measurements were made for the nitrogen 

 obtained by the second method at a mean temperature 18° 0. ; 

 the results are 



10 6 . % ^=- 0'288 and -0-287, 



the mean value being 



Xlf = -0-288 xlO- 6 . 



The volume susceptibility at 20° C. and 760 mm. pressure is 



^=_0-00033 6 xl0- c . 



Thus the value of the susceptibility of nitrogen obtained 

 by the second method is about 8 per cent, more diamagnetic 

 than that obtained by the first method, but it was sufficient 

 as a check and no further study was made of the cause of 

 the deviation. 



In the third method the atmospheric air was introduced 

 into the reservoir throuo-h the bottles, containing a solution 

 of caustic potash, calcium chloride, concentrated ammonia 

 solution, and red-hot copper gauze. Before filling the gas 

 in the compressing cylinder it was passed through bottles 

 containing strong sulphuric acid and calcium chloride, and 

 then through the trains of purifiers, which were exactly the 

 same as those used in the preceding experiment. 



The following are the data in the determination of the 

 susceptibility of the atmospheric nitrogen : — 







Table X. 











Jan. 11, 



1917. 











N 



'' (jp=30 atm.) 





Y ACTUM. 





6* 10 m p.m., *r=15°-0 C, 6=20-0. 



8 h 40 m p.m., t= 



= 14°-7C, 



6=20-0, 



m N 2 



+ m o = 89-4916 gm. 





™ =89-351Sgm, 





C. 



S. 



d. 



C. 



S. 



0. 



. '»■ 



amp. 



cm. 



cm. 



amp. 



cm. 



cm. 



cm. 







60-00 



-11-80 







5600 



-6-50 



-8-00 



10 



48-20 



-11-80 



10 



49-50 



-9-50 



-8-35 







60-00 



-12-50 







59-00 



-7-20 



-7-70 



10 



47-50 



-11-70 



10 



51-80 



-8-20 



-8-10 







59-20 



-11-40 







60-00 



-8-00 



-8-35 



10 



47-80 



- 10-80 



10 



52-00 



-8-70 



-860 







58-60 



-12-10 







60-70 



-8-50 



-8-75 



10 



46-50 



-11-80 



10 



52-20 



-9-00 



-8-55 







58-30 



— 11 -74 (mean) 







61-20 



-8-10 



-7-65 









10 



5310 



-7-20 



-7-65 













60-30 



-8-10 



-795 









10 



52-20 



-7-80 

















60-00 





-8-15(1 



