>38 Mr. Take Sone on the Magnetic Susceptibilities 



(c) Results of Magnetic Measurement. 



About thirty independent observations were made for the 

 pare hydrogen gas ; the following table contains the data 

 for the magnetic susceptibility of the gas obtained in twelve 

 sets of measurement which give the most reliable results. 



In the table, vn H * t s: , % H ,m a , t a , and % a denote the masses, 

 temperatures, and specific susceptibilities of hydrogen and 

 air respectively. The experiments are arranged in a 

 chronological order. 











Table XI. 









No. 



<w 



7U H* 



T 



a 



m . 



a 



t . - 

 a 



-XllJXa 



-xmi-™ 



1... 



-4-63 



0-0134 



13°-5 



13-47 



0-00327 



13°-0 



0-0840 



2-052 



2... 



-2-73 



0-0076 



15°-0 



14-92 



0-00332 



15°-2 



0-0803 



1-945 



3... 



-5-34 



00127 



15°-5 



17-22 



0-00333 



15°-2 



0-0815 



1-975 



4... 



-4-44 



0-0143 



18°-0 



18-25 



0-00463 



17°-2 



00791 



1-903 



5... 



-5-13 



00161 



18°-0 



18-32 



0-00464 



18°-2 



00805 



1-931 



6... 



-4-95 



0-0156 



20°-0 



1734 



0-00455 



19°-2 



0-0834 



1-994 



7... 



-499 



0-0157 



20°-0 



17-00 



0-00456 



20° -0 



0-0855 



2-039 



8... 



-4-22 



0129 



22°-0 



18-28 



0-00450 



21°-5 



0-0805 



1-910 



9... 



-3-85 



00124 



23°-0 



16-51 



0-00450 



22°-0 



0-0846 



2-004 



10... 



-4-85 



00149 



26°-2 



16-34 



0-00438 



27°'0 



0-0872 



2-030 



11... 



-4-53 



0-0144 



22°-5 



16-64 



0-00454 



22° 



0-0860 



2-038 



12... 



-4-68 



0-0156 



25°-0 



16-19 



000450 



23° '5 



00834 



1-965 

















(Mean) 1*982 



















±0-015 



As we see in the above table, we get as the mean value of 

 the specific susceptibilities of hydrogen obtained from twelve 

 measurements at a mean temperature of about 16° C v 



;^=-1-98 2 x10- 6 + 0-01 5 x10- 6 , 



the mean error amounts to 0*76 per cent, of the total 

 value. 



Multiplying the density of hydrogen at 20° and 760 mm. 

 pressure, we get as the susceptibility per unit volume of 

 hydrogen at the normal pressure and 20° C, 



K Hi = - O000165 9 x 10- 6 + O-OOOOOlg x 10" 6 . 



The following is an example of the data of the magnetic 

 measurement of gaseous hydrogen : — 



