Clinical Electro-Therapeutics, Medical and Surgical: A Hand-Book for Physicians in the Treatment of Nervous and Other Diseases (Classic Reprint)

Excerpt from Clinical Electro-Therapeutics, Medical and Surgical: A Hand-Book for Physicians in the Treatment of Nervous and Other Diseases

Thales, who lived six centuries before Christ, knew that, when amber was rubbed with silk, it acquired the property of attracting light bodies, but not till several hundred years after ward was it known that other substances possessed a like quality; and these were sulphur, wax, glass, etc. Dr. Gilbert, . Physician to Queen Elizabeth, was the demonstrator of these ficts. In the year 1789 contact electricity was discovered by Galvani, and in the year 1831 induction electricity was given to the world by Faraday.

When a glass rod or stick of sealing-wax is rubbed with a piece of flannel or fur, it will be found to have acquired the power to attract some very light body - for instance, a pith-ball.

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