3479980 Meyer\'s autographic telegraph, 1874; (add.info.: Meyer\'s autographic telegraph. The image to be dispatched was written on metallised paper with insulating ink and placed round a metal cylinder. A metal stylus moved over the dispatch from side to side; and as contact was made and broken by the ink; impulses were sent to receiving station where a second stylus reproduced the image on paper impregnated with potassium Ferro cyanide, 1874.); Universal History Archive/UIG; out of copyright.