494 Proceedings of Royal Society of Edinburgh. [sess. 
sidered. I propose, later, to consider the magnetic metals more 
thoroughly. In tellurium and antimony the variations of resistance 
perpendicular to the lines of magnetic force were considered. 
The notation is the same as that of my other papers, viz.: by 
transverse effect is meant the galvanometer reading divided by the 
primary current ; in nickel, however, the readings of four observa- 
tions are added together. 
The variation of resistance was measured by the Wheatstone 
bridge method, as modified by Lord Kelvin. The galvanometer 
reading — the bridge being first arranged so as to give no current 
with the electromagnet off — divided by the primary, was taken as 
its measure. 
The results for the three metals can be summed up as follows : — 
The decrease of resistance in a nickel plate placed perpendicular 
to the lines of force in a steady magnetic field, and the increase of 
resistance in plates of antimony and tellurium similarly placed, are 
proportional to the magnetisation sguared. 
Numerical Results and Diagrams. 
The temperature of the room was about 25° C. when the experi- 
ments were made. 
^ Length: 33'0 
Antimony, . . Breadth: 18*5 Vmms. 
( Thickness : 1*07; 
I. Plate cut from a Block of Star Antimony and worked into 
proper form hy filing. 
Field. 
Trans, effect 
observed. 
An (A?i)3 
observed. 
Cl Vaw = Trans, effect. 
5,610 
+ “0229 
11,050 
+ “0426 
+ •0408 
•202 
+ ■21 
14,620 
+ •0569 
•0659 
•242 
•23 
15,640 
+ *0601 
•0745 
•273 
•22 
17,000 
+ “0630 
•0874 
•295 
•24 
