The Sensitiveness of Selenium to Light of Different Colours.


    SOME curious facts about the behaviour of the selenium cell are mentioned in a recent paper by A. H. Pfund.1 The possibility of using these cells for ordinary photometric processes has often been discussed, but there are certain irregu-larities in their behaviour which set a limit to their usefulness.


    1. 1

      Phys. Review, xxxiv., No. 5, May, 1912.

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