The Influence of Metallic Tractors on the Human Body

In Removing Various Painful Inflammatory Diseases, ... Lately Discovered by Dr. Perkins, of North America; 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, ... By Benjamin Douglas Perkins, ...

by Benjamin Douglas Perkins · 1798