HALL. — THERMAL AND ELECTRICAL EFFECTS IN SOFT IRON. 55 



2070 -f- 2055 = 1.0073 at 89. 4°, 

 1722 -r- 1703 = 1.0111 at 17.3°. 



Change from one set of calibration values to the other would make 

 but little difference in the value found for the Thomson effect coeffi- 

 cient and no large difference in the value found for f. Accordingly, the 

 thermo-electric heights found by Mr. Churchill have been retained in all 

 the important calculations of this paper. 



