site end of the tube, they are posD lively charged, The electro-static field between these , two charges 'focuses the electrons. They converge to male clear images on a glass screen, which is the end of tube, opposite the receiving lens. This screen is the ne\y mechanical retina,
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Bibliographic details
Nelson Evening Mail, Volume LXIX, 1 February 1936, Page 3
Word Count
47Untitled Nelson Evening Mail, Volume LXIX, 1 February 1936, Page 3
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