Willoughby Smith

right Willoughby Smith (6 April 1828, in Great Yarmouth, Norfolk – 17 July 1891, in Eastbourne, Sussex) was an English electrical engineer who discovered the photoconductivity of the element selenium. This discovery led to the invention of photoelectric cells, including those used in the earliest television systems. Provided by Wikipedia
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    The rise and extension of submarine telegraphy.
    Book
    by Smith, Willoughby
    Published 1974
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