THERMO-ELECTRIC QUALITY UNDER PRESSURE, 



327 



Nickel. This was the same piece of wire as that whose resistance 

 under pressure was measiu'ed. The insulation was stripped, and it 

 was used in five parallel strands of bare wire. The points obtained 

 are not as regular as could be desired because of failure of the tempera- 



c 



o 



> 



u. 



UJ 





50^ 60° 

 Temperatiire 

 Nickel 

 Figure 23. Nickel. Thermal E.M.F. of a couple composed of one branch 

 of uncompressed metal, the other compressed to the pressure in kg./cm."^ 

 indicated on the curves, one junction being at 0°C and the other at the tempera- 

 ture plotted as abscissae. 



ture regulator to work perfectly. The regulator was cleaned after 

 these runs, and was again perfectly satisfactory. It did not seem 

 worth while to repeat the runs on nickel for the sake of the slightly 

 greater obtainable accuracy. 



