Selenium : its electrical qualities, and the effect of light thereon : being a paper read before the Society of Telegraph Engineers, 28th November, 1877 / by Willoughby Smith.

  • Smith, Willoughby, 1828-1891.
Date:
[1877]
Catalogue details

Licence: Public Domain Mark

Credit: Selenium : its electrical qualities, and the effect of light thereon : being a paper read before the Society of Telegraph Engineers, 28th November, 1877 / by Willoughby Smith. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    megohms, for about thirty shillings each. I have in- structed Messrs. Elliott Brothers how to prepare them, and I believe they are willing to supply them at some- thing like that price. The full importance of these cheap high resistances will be more fully realised when we have a good system of underground wires ; for I have reason to believe, from the results of experiments I have made, that by a judicious arrangement of high resistances at various junctions in a long subterranean line the speed would be much increased. This, however, is a subject rather foreign to my present paper, but one which I may at some future time ask permission to bring before the Society. HAYMAN BROS. AND LILLY, PRIHTEE3, HATTON HOUSE, FABKINGDON KOAD, B.C.