SELENIUM CELL • E-FREE TRANSLATION.COM • Definition of Selenium cell

... would affect the stream of gas flowing in a sensitive burner. The flame was thus thrown into vibrations corresponding to the vibrations of sound. The rays from this flame were then directed by mirrors to a distant receiving station and there concentrated on a photo-electric selenium cell, which has the strange property of varying its resistance according to the illumination. Thus a telephone receiver arranged in series with it was made ...

— Masters of Space - Morse, Thompson, Bell, Marconi, Carty • Walter Kellogg Towers