Tables 392-394. 

 TABLE 392. - Peltier Effect 



321 



ThecoeflRcient of Peltier effect may be calculated from the constants A and B of Table 386, as 

 there shown. With Q (see Table 385) in microvolts per * C. and T^* absolute temperature (,K), 



QT 

 the coefficient of Peltier effect= - - cal. per coulomb=o. 00086 QT cal. per ampere-hour=Qr/iooo 



42 

 millivolts (=millijoules per coulomb). Experimental results, expressed in slightly different units, 

 are here given. The figures are for the heat production at a junction of copper and the metal 

 named, in calories per ampere-hour. The current flowing from copper to the metal named, a posi- 

 tive-sign indicates a warming of the junction. The temperature not being stated by either author, 

 and Le Roux not giving the algebraic signs, these results are not of great value. 



* " Wied. Ann.'' vol. 34, p. 767. 



t " Ann. de Chim. et de Phys." (4) vol. to, p. 201. 



t Becquerel's antimony is S06 parts Sb + 406 parts Zn -j- 121 parts BL 



§ Becquerel's bismuth is 10 parts Bi + i part Sb. 



TABLE 393. — Peltier Effect, Fe-Constantan, Nl-Cn, — 560° 0. 



TABLE 394. — Peltier Electromotive Force in ISllliToltB. 



Le Roux, 1S67; Jahn, iS&S; Edluad, 1870-71 ; Caswell, Phys. Rev- 32, p. 381, 1911. 



8M1THSON4AM TABLES. 



