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CAMERAS AND SCIENTIFIC INSTRUMENTS - J. R. Chislett, - a Grigg's Conical Electromagnetic machine...

Currency:GBP Category:Everything Else / Other Start Price:NA Estimated At:300.00 - 400.00 GBP
CAMERAS AND SCIENTIFIC INSTRUMENTS - J. R. Chislett, - a Grigg's Conical Electromagnetic machine...
CAMERAS AND SCIENTIFIC INSTRUMENTS - J. R. Chislett, - a Grigg's Conical Electromagnetic machine J. R. Chislett, - a Grigg's Conical Electromagnetic machine, patented January 8th, 1873, the mahogany conical coil housing with adjustable ivory capped iron wire core, magnet shaped electromagnetic interrupter to one side and four lacquered brass connectors mounted to each corner, makers signed plaque '34 Eastbourne Terrace, Hyde Park, London, maker Plymouth', 10.5in long