Electricity made simple and treated non-technically by Haskins Clark Caryl

Author:Haskins, Clark Caryl. [from old catalog]
Language: eng
Format: epub, pdf
Tags: Electricity. [from old catalog]
Publisher: Chicago [C. Macdonald]
Published: 1900-03-25T05:00:00+00:00

275. Another method consists in the use of two bar magnets, their opposite poles touching- the bar to be magnetized at its centre, then drawing them to its extremities. In this method each magnet influences but half of the bar. The north pole of the inducing magnet moving for instance to the right, the south to the left. This is called the divided touch.

276. A third method is known as the double touch. Remove the armature of the horse-shoe magnet shown in Fig. 47, and holding it in a fixed position on the bar, slide it backward and forward from end to end, without removing it, except to treat the next side of the bar, which in turn is to be rubbed on all four sides. When the bar is sufficiently magnetized the horse-shoe should be brought to the centre of the bar, and then removed.

277. We have now demonstrated that there is a magnetic influence exerted in certain directions which is strongest at

the two poles, and decreases as we recede toward a point midway between them. The space in which this influence is shown to exist is known as the magnetic field, or field of magnetic force, and appears to be made up of curved lines which radiate from either pole, and seek to join. Experiment i. I^ay a horse-shoe magnet on a sheet of 128

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