LABORATORY NOTES. 



297 



palladimn aiid llic other equivaJciit iiicta].<. The Ya]iie.> of the 

 therinoelectric powers "were eaJculated for 0° C aiid 100'" C and are 

 given ill the followiiii:- Table. The symho] Pi staudo for ijioinutli, Co 

 for cobalt, aiid Pd for palladiuiii, Tlie variou;> " etjiiivaleiit iiietafs " 

 are repre.seuled by the ;<yiiil)ol Pd Pi „ where tlie ijiindier n represent« 

 the ratio of the reniistaiice in Um l)i.;niiilh ])raueh to the refdstanee in 

 the pa]Ia(b"iini branch. Tdui;^ Pd JJio means that, iince the palladium 

 ahvay.r; contained 100 ohms resistance, the l)is]nuth contained in this 

 case 200 ohms. The electromotive forces are measm-ed in microvolts. 



Thermoelectric Powers referred to Palla.dium. 



The numljers in the last row liave heeu calcidated from the 

 numbers in all the six Pd Pi rcjws. Tor if p is the thermoelectric 

 power between Pd and Pi and p,i the same Ijetween l*d and Pd Pi,j we 

 know that 



P - Ih 



p, 



or 



p = {ll + 1) pn 



Thus from Ihe six sets of values corresponding- to p^ we obtain the 

 following values for p at ifC. and lOO^'C. 



