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2015-01-28 01:41:00
(1) Electric Lamps. Letters Patent for an Invention of "IMPROVEMENTS IN ELECTRIC LAMPS, AND IN THE MATERIALS EMPLOYED IN THEIR CONSTRUCTION." [British Patent] No. 4933. +<br>(2) Electric Lighting by Incandescence (Royal Institution of Great Britain. Weekly Evening Meeting, Friday, March 10, 1882. (Offprint).<br>(3) Original handwritten letter, signed "J.W. Swan", to "G.S. Bruce Esquire", dated "June 8/85".
[London, Eyre and Spottiswoode], 1880, 27th November + 1882 + 1885 (1): 8vo. Unbound. With a recent, discreete paper spine. A few smaller tears to extremities. 4 pp. + 1 plate (showing electric light bulbs].(2): 8vo. Original self-wrappers. Stitched at spine. Near mint.(3): 4 pages 8vo. ¶ Scarce original printed patent for the seminal invention that is the incandescent light bulb. Though usually erroneously ascribed to Thomas Edison, it was in fact Joseph Swan who invented the light bulb and ended the dark ages. - Here sold together with the extremely scarce offprint of Swan's 1882 speech on his seminal invention as well as a highly important and interesting autograph letter on the same subject, namely "the new filament or "Artificial Silk" as I have been calling it", in which Swan also confirms his priority in invention and warns against letting the withsent speciman fall into the hands of lamp makers. Swan first publicly demonstrated his incandescent carbon lamp at a lecture for the Newcastle upon Tyne Chemical Society on December 18th 1878. However, after burning with a bright light for some minutes in his laboratory, the lamp broke down due to excessive current. By 1879 Swan had solved the problem of incandescent electric lighting by means of a vacuum lamp and he publicly demonstrated a working lamp to a larger audience. He was not completely satisfied, however, as there were still some fundamental problems attached to it that would make it impossible to consider the invention completed. By 1880, however, he had finally reached perfection. The striking improvements cons … [Click Below for Full Description]
Bookseller: Herman H J Lynge & Søn A/S [DK]
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