TELEVISION

Grey River Argus, 17 April 1925, Page 2

TELEVISION

WONDERFUL ACHIEVEMENT. WORK OF YOUNG SCOTSMAN. Television is one of the .greatest achievements of civilised man. The science is still in its infancy, but the progress of transmission is being rapidly improved. Ace rding to the Loudon “Daily News” parly this year J. L.. Baird, a young Scottish -inventor, gave a. demonstration in which, simple shadowgraph figures were transmitteo, on the lines of television, from one part of his machine to another. Ho Ims now succeeded in transmitting objects from the machine to a receiving apparatus placed in another room. A witness of the demonstration of the neW invention saw a letter “IT” projected from the one to the other. The hand of the inventor, passed across th- 1 field of vision on the transmitter, was observed in blurred outline moving across the “screen” on the receiving apparatus. Mr Baird states that with his present crude much inery he has been able to project the I outline of a face, and he is able to show distinguishable likencssess of human objects. Technically, his system !is as follows:—Light from every part of the object is in succession projeeted on to a. light-sensitive cell by means of a system of lenses and shutters. The cell is a colloidal, (fluid) cell, which changes its resistance in pro portion to the light falling on it. The varying current from this cell transmitted io the receiving station, where it controls a. beam which is made to traverse the screen exactly in unison with tho passing of the image over tho colloidal cell.