146 
Proceedings of Royal Society of Edinburgh. [sess. 
On the Relation between the Hall Effect and Thermo- 
electricity in Bismuth and in various Alloys. By Dr 
J. C. Beattie. 
(Read July 6, 1896.) 
I have, in a previous communication* to the Society, given 
results for a number of alloys ; these I propose to discuss from the 
point of view suggested by the title of this paper ; I shall also 
discuss the results published by other experimenters, which relate 
chiefly to the behaviour of the Hall effect by constant field and 
variable temperature. 
In attempting to explain the transverse effect, we have two 
things to consider. (1) The direction, and (2) the magnitude. 
In the following table the metals are arranged in a thermo-electric 
series as given by Wiedemann;! and in the second column the 
direction and magnitude of the transverse effect in terms of the 
rotatory coefficient R, according to Ettingshausen | and Herns t’s 
results, are given. 
Metal. 
R. 
Bismuth, . 
— 
10T 
Cobalt, 
+ 
0-00459 
Hick el, 
— 
0-0242 
German silver, . 
— 
0-00053 
Palladium, 
— 
0-00115 
Aluminium, 
— 
0-00038 
Lead, 
+ 
0-00009 (or zero according to Hall) 
Tin, . 
— 
0-00004 
Copper, 
— 
0-00052 
Platinum, . 
— 
0-00024 
* Proc. Pay. Soc. of Edin., 1895. 
t Wiedemann’s Lehre von der Electricitat, Bd. ii. 
X Sitzungsberichte der kaiserlichen AJcademie zu Wien , 1886. 
