Intelligence and Miscellaneous Articles. 317 
It will be observed from Table III. that a very small weight was 
sufficient to throw back the steel needle to 80°, and that, on the 
contrary, it is from 90° to 70° that the soft iron needle sustains 
itself with comparatively the greatest power, requiring very nearly 
double the weight which suffices for the steel needle to balance it at 
the latter angle. When reduced to 40°, however, the smallest pos- 
sible additional weight throws back the iron needle to zero, and in 
every case it was necessary to moveit aside with the finger to nearly 
that angle, before it would exhibit the slightest action under the 
influence of the current, or, in other words, any perceptible trace of 
longitudinal magnetization. In fact, being laterally magnetized 
when hanging in a vertical position, it necessarily offered a certain 
resistance to deflection. 
On taking out the steel needle after these experiments, it was 
found to have retained its original magnetism unimpaired. 
The tangent galvanometer by which the force of the current was 
Fig. 3. 
