350 



BRIDGMAN. 



eflFect, except for the two bad points mentioned at 75°. The maxi- 

 mum zero correction was 2.5%, and the average numerical departure 

 of all points from smooth curves was 0.81%. At constant temperature 

 the relation between e.m.f. and pressure was linear. In passing to 

 the curves at constant pressure from those at constant temperature 

 it was necessary to disregard the 75° points, the discrepancy amount- 

 ing to 4.3%, but the other points required no readjustment. If the 

 second run at 75° could have been carried through, the adjustment 



TABLE XXXII. 



PLATiJfUM (Pure). 

 Thermo-electromotive Force, volts X 10^. 



at 75° would have been only about 1%, so that there is reason to trust 

 the results obtained. 



For Baker's platinum, the maximum zero correction was 1.5% of 

 the maximum effect, the maximum departure of any single observed 

 point from a smooth curve was 3.1%, and the average numerical 

 departure was 0.80%. At constant temperature the curves of e.m.f. 

 against pressure are convex toward the pressure axis, not what one 

 would expect, and the curves of e.m.f. at constant pressure against 

 temperature are also convex toward the temperature axis. In passing 

 from e.m.f. curves at constant temperature to those at constant 

 pressure the maximum readjustment necessary was 1.1%. 



