Improvements in electro-magnetic apparatus adapted to the generation of electric currents for exercising and other hygienic purposes.
Author
Date
1884.
Topic
Genre
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.