Improvements in electro-magnetic apparatus adapted to the generation of electric currents for exercising and other hygienic purposes
Publisher: [Great Seal Patent Office?]
Published: 1884
Place of publication: [London?]
Language: eng
Subjects: Dumbbells; Exercise; Magnetic Field Therapy; Instrumentation; Electric Stimulation Therapy
Notes: Title from head of text.

At head of title: A.D. 1884, 28th April. No. 6904.

"Herbert John Allison, of the firm of Allison Brothers, of 52 Chancery Lane, London, in the county of Middlesex, patent agents."

Includes provisional and complete specifications.