TABLE 256. 



THERMOELECTRIC POWER OF ALLOYS. 



The thermoelectric powers of a number of alloys are given in this table, the authority being Ed. Becquerel. 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 

 jzf 



- = A + Bt, and have to be multiplied by the absolute 



at 



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



also Table 255.) 



* Tail's " Heat," p. 180. 



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



SMITHSONIAN TABLES. 



249 



