Transverse G-alvanomagnetic and Thermomagnetic Effects 49 
/1_2\ 
consequently the term 2 s)> which enters into the expression for the 
Hall effect, will differ greatly in value from the one metal to the other. 
This is difficult to reconcile with the experimental fact that the Hall 
effect has about the same value in both metals. 
Summary. 
The four transverse galvanomagnetic and thermomagnetic effects were 
determined in the case of iron, nickel, cobalt, silver, copper, zinc, cadmium, 
aluminium. 
The results were considered in the light of the electron theory of 
conduction in metals as formulated by G. H. Livens, and were found to 
be in fair accord with the theory as regards the ratios of the effects, but 
they could not be reconciled with the expressions given for the effects 
themselves. 
( Issued separately March 17, 1921.) 
VOL. XL1 
4 
