Sometime ago while filing away the surface of the selenium in a Giltay cell in order to find out directly certain limits on the depth of penetration of selenium by light, I discovered a new effect. This effect of mechanical rupture on light-positive selenium resembles in a general way the many other well-known effects in these varieties of selenium. Rupture produces an increase in the conductivity, but this increase is not permanent. The recovery is extremely slow, often requiring more than a month for the selenium to attain the electrical condition existing before rupture. The experiments are especially interesting because of their bearing on the dynamic equilibrium theory of light sensitive selenium.
Proceedings of the Iowa Academy of Science
© Copyright 1912 by the Iowa Academy of Science, Inc.
Brown, F. C.
"The Effect of Rupture by Abrasion on the Electrical Conductivity of Selenium,"
Proceedings of the Iowa Academy of Science, 19(1), 179-184.
Available at: https://scholarworks.uni.edu/pias/vol19/iss1/32