316 Intelligence and Miscellaneous Articles. 
cases the battery power employed was twelve small Grove’s, but the 
current declined, in the course of the experiments, from 47° to 45° 
on the tangent galvanometer, which accounts for the fact that the 
maximum weights supported are less than in the earlier experiments 
recorded in Table II. In working out Table III., the weight em- 
ployed (1000 grains) was simply advanced along the lever, and its 
reduced amount at the poles of the needle noted when the index, in 
gradually retreating, pointed to the successive angles specified. The 
results in Table IV. were obtained by moving the weight from one 
to another of the successive divisions, marked 1, 2, 3, &c. on the 
lever; and the differences of the angles vary, as might be expected, 
in nearly the reverse order of the differences of weights in Table 
II. :— 
Table III. 
Angles on Weights reduced Differences of 
balance to force at successive 
galvanometer. |needle, in grains. | weights. 
90 6'0 Se 
80 6-5 oF 
70 15:5 75 
With magnetized steel 60 23-0 7-0 
needle. 4 50 30:0 5-0 
40 35:0 bs 
30 39-4 af 
20 41°5 0°5 
see 10 42-0 
gt 90 0-0 i 
I § 80 155 nh 
29°35 
With soft iron needle. “ he 11-0 
50 50:0 vs 
40 53°0 
Table IV. 
Weights reduced} Angles on Differences of 
to force at balance successive 
needle, ingrains.| galvanometer. angles. 
0-0 90 0 e 
10-0 75 30 rete 
With magnetized steel 20:0 63 0 
needle. 30-0 48 30 a - 
40°0 26 0 
\ 4165 
PU rh he aa Wi pea DEEL 
10-0 84 0 see 
20°0 76 30 8 10 
With soft iron needle. |< 30-0 68 20 
8 10 
40°0 59 10 12 0 
50-0 47 10 
52°0 0 0 
