Experiments with the metallic tractors [electronic resource] : in rheumatic and gouty affections, inflammations, and various topical diseases; as published by surgeons Herholdt and Rafn, of the Royal Academy of Sciences, Copenhagen; Translated into German by Professor Tode, Physician to his Danish Majesty; thence into the English Language by Mr. Charles Kampfmuller: also reports of about One Hundred and Fifty Cases, in England; demonstrating the efficacy of the metallic practice, In a Variety of Complaints, Both upon the Human Body, and on Horses, &c. By Medical, and other Respectable Characters. Edited by Benjamin Douglas Perkins, A. M. of Leicester-Square, London, son of the discoverer.