1894-95.] Mr J. C. Beattie on Alloys in a Magnetic Field. 489 
With a third alloy — VII. Bismuth, 13 grms. ; lead, 2*4 grms. — 
the transverse effect was observable and was throughout positive. 
The equation = transverse effect only holds if we take 
a weak field as our starting field ; if we take one of the higher ones 
and combine it with all others, the constants obtained with the 
high fields are much less than those obtained with low ones. In 
fact, the transverse effect for high fields is practically proportional 
to 
In diagram I., figs. 2 and 3, we have the transverse effect and 
variation of resistance for a pure bismuth plate — B, fig. 2 ; and for 
the alloys V, VI, VII. Compare diagram I., fig. 1, diagram II., 
fig. 4. 
In fig. 3 it will be noticed that V resembles the corresponding 
bismuth curve, while VI and VII are concave towards the x axis, 
VII more so than VI. 
Curve B in fig. 2, is drawn to scale J, V and VI to scale unity. 
Antimony-Zine Alloys . — Difficult to cast, and difficult to bring 
into proper form. The plates used were in many cases not quite 
regular throughout. 
Plate VIII. 
/■Length: 25’25 \ 
Antimony, 18 grms.; zinc, 3 grms. < Breadth: 14’75 Vmms. 
V Thickness : 1 ’08 ) 
Temp. 20° C. 
Field. 
Trails, effect. 
5,610 
+ -0134 
> 
1 
11,050 
+ •0241 
14,620 
+ -0322 
1 
A small increase in re- 
sistance observed. 
15,640 
+ -0347 
17,000 
+ -0376 
J 
1 
