Great Britain. Patent Office.
Patents for inventions. Abridgments of specifications relating to electricity and magnetism, their generation and applications. Part II.-A.D. 1858-1866.
Electric apparatus and appliances -- Patents.
Magnetic instruments -- Patents.
Patents -- Great Britain.
Woodcroft, Bennet, 1803-1879.
Jehl, Francis, 1863-1941,
Dibner, Bern. DSI.
Abridgments of specifications relating to electricity and magnetism.
England London.