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.

Licence: Public Domain Mark

Credit: 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. Source: Wellcome Collection.