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Improvements in electro-magnetic apparatus adapted to the generation of electric currents for exercising and other hygienic purposes.
- Allison, John Herbert
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About this work
[London?] : [Great Seal Patent Office?], 1884.
London : Eyre and Spottiswoode, printers to the Queen's most excellent Majesty. For Her Majesty's Stationery Office, 1885.
6 pages : black and white illustrations ; 27 cm
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.