Boyd's Battery



The Boyd's Battery (or Boyd's Miniature Galvanic Battery) is an electrotherapeutic medical medallion, promising to generate a healing electric current in the wearer, produced by the reaction of the varying metals constituting the battery with the wearer's skin (as a galvanic response). It was advertised as having been invented by Professor J. C. Boyd, for whom it is named, and sold beginning in 1878 through local agents of Boyd's Galvanic Battery Co.

Design
The battery itself is approximately 3 centimetres in diameter, and is composed of 12 individual disks of copper, brass, German silver, and nickel, surrounding a central copper rosette, itself with a brass disk plugged into the centre, all of which is encircled by a brass ring.

Effects
According to the advertising copy, a Boyd's Battery acts according to the principles of Galvanism, whereby "the union of two or more metals" (through Galvanic corrosion) produces electricity. In the case of Boyd's Battery, the electrolyte is said to be the "natural humidity of the skin", which in reacting with the different metals of the medallion produces a "constant but gentle flow of electricity".

Among other afflictions, a Boyd's Battery was recommended to those subject to any of the following symptoms: "Restless Nights, Nightmare, Palpitation of the Heart, Loss of Confidence, Dizziness, Fainting Spells, Loss of Memory, Fullness of Blood, Fits of Melancholy, Debilitated, Lack of Power of Will and Action, Disordered Condition of the Liver, Blood, Kidneys, or Urinary Organs". It was proposed that "these troubles arise mostly from relxation or debility, for the relief of which electricity is eminently adapted."

Resources

 * "Boyd's Miniature Galvanic Battery Paperwork!" (electrotherapymuseum.com) &mdash; scans of original advertising and testimonials for Boyd's Battery.