The American journal of science and arts . needle swung over 90°. Thefollowing experiment is still more striking. Connect two electro-magnets, so that they shall be charged in sequence, but at thesame time, and with the same battery. Load one of them withabout as much as it will hold. Apply the armature to the otherma2;net, and the weight of the first magnet will immediately same may be repeated with either magnet. The power ofthis reacting current, as it may be called, is in proportion to thenumber of magnets in use, charged by the same battery, the num- * A steel magnet gains power
The American journal of science and arts . needle swung over 90°. Thefollowing experiment is still more striking. Connect two electro-magnets, so that they shall be charged in sequence, but at thesame time, and with the same battery. Load one of them withabout as much as it will hold. Apply the armature to the otherma2;net, and the weight of the first magnet will immediately same may be repeated with either magnet. The power ofthis reacting current, as it may be called, is in proportion to thenumber of magnets in use, charged by the same battery, the num- * A steel magnet gains power slowly when its poles are armed and loaded sim-ply by determination, or insulation of its poles. Pulling off the armature againweakens its power. Jerking it suddenly off, weakens it still further. In this casethe magnetic forces seem to acquire momentum, and go beyond their original sta-tical development. Researches in Magnetic Electricity. 371 ber of coils of wire covering the magnets, and lastly in proportionto the rapidity of The operation of the magneto-electric multiplier will now beunderstood at a glance. It is simply an electromagnet, with arevolving armature and break-piece. The revolution of the ar-mature is of course equivalent in its effect, or nearly so, to its rec-tilinear approach and abduction, a is a small compound electro-magnet, 12 inches in length before bent, composed of 500 fineiron wires, covered with 5 superposed coils of large copper wire,No. 16, and 7 layers of fine copper wire, No. 26. 6, c, are the 372 Researches in Magnetic Electricity. terminations of the small wire, d, I, the terminations of the largewires. 1, is a wooden strap, which, with a binding-screw, securesthe magnet to the wooden block k. s is a brass strap, to holdfirmly the poles of the magnet, e is the armature of soft iron^which, with the small brass pulley, is fitted firmly to the shaft,o, the multiplying wheel, n, is the break-piece, which is merelya copper ferule dissected
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