Telegraphoscope

Tel′e‐graph″o‐scope (?), n. [Gr. τη̑λε far + -graph + -scope.] An instrument for telegraphically transmitting a picture and reproducing its image as a positive or negative. The transmitter includes a camera obscura and a row of minute selenium cells. The receiver includes an oscillograph, ralay, equilibrator, and an induction coil the sparks from which perforate a paper with tiny holes that form the image.