334 Mr. L. Lownds on the Thermomagnetic and 



the curves, fig. 5. The latter values are very different from 

 the corresponding values of the former. 



R. Defregger * has already made some observations of the 

 longitudinal phenomena with crystalline plates. The mean 

 temperature is not given, but was probably about 50°, since 

 the fall in the plate was obtained by application of steam and 

 water at room-temperature. He describes the phenomenon 

 as change of thermoelectric force by the magnetic field, and 

 records the percentage change. 



For purposes of comparison I have reduced the results for 

 two field-strengths to this form. The following are the 

 data : — 



Crystallographic Axis JL Lines of Force. 1 p i £ q 



Crystallographic Axis II Current of Heat. J ' * 



Percentage change of 

 Thermoelectric Force. 

 H. , *- 



Defregger. Lownds. 



2375 2-26 2*55 



6100 6-95 8*54 



Crystallographic Axis JL Lines of Force. ") p 9 & 3 

 Crystallographic Axis J. Current of Heat. J 



Percentage change of 

 Thermoelectric Force. 

 H. , -A. , 



Defregger. Lownds. 



2375 1-00 0-5 -0-07 



6100 0-69 -0-06 -3-50 



In this case two specimens were used by Defregger. The 

 dissymmetry with reversal of the field was noted by him, and 

 the values given above are the means for the two directions 

 of the field. 



Crystallographic Axis II Lines of Force. Tp o so 

 Crystallographic Axis i. Current of Heat, j 



Percentage change of 

 Thermoelectric Force. 

 H. *■ . 



Defregger. Lownds. 



2540 0-58 0-35 0*62 



4400 0-85 0-60 0-97 



* R. Defregger, Inaug. -Dissert., Miinchen, 1897. 



