340 Mr. L. Lownds on the Thermomagnetic and 



by the application o£ liquid air the curve appears to be dis- 

 continuous, as will be seen from the following data : — 



II Crystallographic Axis. 



t v 



t 2 . 



e (observed). 



e calculated from 

 a = 130-2, £=0-3504. 



o 



-13-8 

 -13-3 



-160 ? 2 

 -157-2 



7851 mv. 

 8012 „ 



10135 mv. 

 10139 „ 



X Crystallographic Axis. 



t v 



t v 



e (observed). 



e calculated from 

 a =48-32, (3 =0-2988. 



o 



-157 

 -15-4 



-145% 

 -146-1 



397 mv. 



432 „ 



mv. 



„ 



Data for temperature-intervals between —80° and —160° 

 were sought by stopping the current of water in G and 

 observing the thermoelectric force as the temperature of d' 

 fell. The fall of temperature was, however, too rapid for 

 one to commute accurately the curve between these limits 

 (the temperature changing in some cases by as much as 3° 

 during the time of observation of the thermoforce). The 

 results are given below; they serve at least to show that the 

 neutral temperature in the first case is higher than — 185°*8, 



II Crystallographic Axis. 



'i- 



t 2 . 



e (microvolts). 



-80 



o 

 -164 



966 



-90 



-166 



372 



-100 



-167 



-205 



-111 



-175 



-747 



-115 



-170 



-754 



-117 



-169 



-745 



-121 



-170 



-922 



-123 



-171 



-951 



