The subject of Magnetism, he said, had of late years become one of great importance. A very few years ago, Magnetism was thought little of, except for matters of experiment, or as processes needed for directing the navigator, the surveyor, or the miner. Now, however, it assumed a degree of importance that placed it among the most mighty agencies by which the Great Creator displays His eternal power and Godhead—agencies by which He controls the elements, and directs and binds them to His will.
Dr. Scoresby illustrated his novel method of charging magnets and steel bars with greatly increased power by two series of experiments. In the first, Mitchell’s ordinary process of magnetizing a number of bars placed in opposition at their extremities was shown, in which the power conferred was insufficient when raised to the vertical position to maintain their own weight; whereas, on the experiment being repeated, but by interposition of a thin plate of soft iron between the magnet and the bars operated upon, and sliding the North Pole in advance over them as before, they were enabled to do so. These processes were, secondly, further displayed in the tractive power of supporting weights, the results of which were, that by the Doctor’s method a horse-shoe piece of iron was enabled to sustain, when magnetized, nearly double the weight of that produced by any previously known process. A very powerful small magnet was exhibited, capable of carrying ten times its own weight, and very effective methods ...
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