266 



Messrs Burton and Phillips, 



Table V. 

 Force on Cell full of Alcohol. 



Current in Electromagnet 



Weight in Pan 



Pull due to Field 



amperes 



7-8 „ 



61-8212 grams 

 61-7440 „ 



- -0772 grams 



o „ 



61-8212 „ 



-•0922 „ 



10 „ 



61-7290 „ 



o „ 



61-8211 „ 



-•1040 „ 



11-9 „ 



61-7171 „ 



„ 



61-8212 „ 



-•1190 „ 



14-8 „ 



61-7022 „ 



The results recorded in the Tables IV and V enable us to 

 deduce the pulls exerted by the magnetic fields on the methyl 

 alcohol alone and, consequently, to calculate the values of the 

 susceptibility of the alcohol from the equation given above, 



2Pg 



k = 



AH' 



These values are given in Table VI. 



Table VI. 

 Susceptibility of Methyl Alcohol. 



Field in 



C. G. s. 



units 



Pull on 

 Full Cell 

 in grams 



Pull on 



Empty Cell 



in grams 



Pull on 



Methyl Al. 



in grams 



Susceptibility 



of Alcohol, 



k = 2PglAH 2 



10,070 

 11,220 

 11,750 

 12,330 



-•0772 

 -•0922 

 -•1040 

 -•1190 



+ -0098 

 + -0107 

 + •0118 

 + •0132 



- -0870 

 -•1029 

 -•1158 

 -•1322 



Mean value 



-6-34x 10- 7 

 -6-13xl0" 7 

 -6-27xl0- 7 

 -6-49xl0- 7 



- 6-31 x 10- 7 



The mean value is in close agreement with those given by 

 Winkelmann* for methyl alcohol : 



Quincke - 6'8 x 10~ 7 , Henrichsen - 6*1 x 10~ 7 . 

 A slight difference in the purity of the alcohols would account for 

 such small variation in these values. 



* Handbuch der Physik, in. 2, pp. 206-9. 



