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The influence of metallic tractors on the human body, in removing various painful inflammatory diseases ... / Lately discovered by Dr. [Elisha] Perkins ... and demonstrated in a series of experiments and observations. By which the importance of the discovery is fully ascertained, and a new field of enquiry opened in the modern science of galvanism, or, animal electricity. By Professors Meigs, Woodward, Rogers, &c, &c.
- Perkins, Benjamin Douglas, 1774-1810.