A Dictionary of Chemistry, on the Basis of Mr. Nicholson's, Vol. 2: In Which the Principles of the Science Are Investigated Anew, and Its Applications ... Agriculture, and Manufactures, Detailed - Softcover

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Excerpt from A Dictionary of Chemistry, on the Basis of Mr. Nicholson's, Vol. 2: In Which the Principles of the Science Are Investigated Anew, and Its Applications to the Phenomena of Nature, Medicine, Mineralogy, Agriculture, and Manufactures, Detailed

If we rub, with a dry hand or a silk handkerchief, a glass tube, and then ap proach it to bits of paper or cotton, to feathers, or which is better, gold leaf, it will first attract these bodies, and then re pel them. If the tube be held parallel to a table on which they have been laid, an electrical dance will be performed. If to the farther end of the tube we hang a brass ball, by a thread of linen, hemp, or a metallic wire, the ball will participate with the rubbed tube, in its mysterious powers. But if the ball be suspended by a cord of silk, worsted, or hair, or by a rod of glass, was or pitch, the attractive and repulsive virtue will not pass into it.

When the atmosphere is dry, if we take in one hand a rod of glass, and in the other a stick of sealing wax, and after having rubbed them against silk or worsted, ap proach one of them to a bit of gold leaf floating in the air, it will first attract and then repel it. Thile the film of gold is seen to avoid the contact of the rod which it has touched, if we bring the other rod into its neighbourhood, attraction will im mediately ensue; and this alternate attrae tion and repulsion may be strikingly dis played by placing the two excited rods at a small distance asunder, with the gold leaf between.

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