Published by Proc. Royal Society, 1913
Seller: Mark Westwood Books PBFA, Hay-on-Wye, HEREF, United Kingdom
Association Member: PBFA
Soft cover. Condition: Good. pp: 75-90. Offprint in original paper wrappers. The experiments described show that a selenium 'bridge' is far more sensitive than the human eye. In 1909 Fournier and Rignoux had described a television device using an array of selenium cells to pick up am image.