Effect of Light on Selenium During the Passage of An Electric Current ^*

Abstract

BEING desirous of obtaining a more suitable highresist ance for use at the Shore Station in connection with my system of testing and signalling during the submersion of long submarine cables, I was induced to experiment with, bars of selenium, a known metal of very high resistance. I obtained several bars varying in length from 5 to 10 centimetres, and of a diameter from I to 11/2 millimetres. Each bar was hermetically sealed in a glass tube, and a platinum wire projected from each end for the purpose of connection.