THERMO-ELECTRIC QUALITY UNDER PRESSURE. 



381 



There is almost exact parallelism between the columns of pressure 

 effect on e.ni.f. and on Peltier heat; these two columns differ only by 

 two single in^•ersions, Al with Cu, and manganin with Sn. This of 

 course means that nearly all the total e.m.f. in a pressure thermo- 



TABLE XLV. 



The Metals in Order of Decreasing Numerical Magnitudes of Various 



Properties. 



The horizontal bars in some columns show where the effect changes sign. 



electric couple (that is, a couple of two branches of the same metal, 

 one compressed and the other not) is provided by the difference of 

 Peltier heat at the hot and cold junctions, and comparatively little 

 by the pressure effect on the Thomson heat. This has been otherwise 



