Table 256. 



THERMOELECTRIC POWER OF ALLOYS. 



The thermoelecfric powers of a number of alloys are given in this table, the authority being Ed. Becquercl. They are 

 relative to lead, and for a mean temperature of 50"^ C. In reducing the results from copper as a reference metal, 

 the thermoelectric power of lead to copper was taken as — 1.9. 



Table 257. 



NEUTRAL POINTS WITH LEAD.' 



Table 258. 

 SPECIFIC HEATS OF ELECTRICITY. t 



The numbers are the coefficients B in the equation 



££1 z= A -{- Bt, and have to be multiplied by the absolute 



dt 



temperature T to give the specific heat of electricity. (See 



also Table 255.) 



*Tait-s "Heat," p. iSo. 



t Calculated from a table given by Tait by assuming the electromotive force of a Grove's cell = 1.95 volts. 



Smithsonian Tables. 



249 



