Graphoscope | n. [ Gr. gra`fein to write + -scope. ] 1. An optical instrument for magnifying engravings, photographs, etc., usually having one large lens and two smaller ones. [ 1913 Webster ] 2. An optical device for showing (or photographing) an image when projected upon the atmosphere as a screen. [ Webster 1913 Suppl. ] |
Telegraphoscope | 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, relay, equilibrator, and an induction coil the sparks from which perforate a paper with tiny holes that form the image. It is now (1999) obsolete, having been replaced by telefax and internet transmission of images. [ Webster 1913 Suppl. +PJC ] |