Source : Webster's Revised Unabridged Dictionary (1913)

Telegraphoscope \Tel`e*graph"o*scope\, n. [Gr. th^le 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.