Flame-based telegraphy,Ancient Greece

Numéro d’image : 11708840
Flame-based telegraphy,Ancient Greece
Flame-based telegraphy,Ancient Greece. This system was described by Ancient Greek historian and scholar Polybius in around 150 BC. It was a system of communication using a series of torches to indicate letters of the alphabet. Ten torches and two walls were used to spell out words by their constituent letters according to a grid of coordinates. One torch on the left and three on the right,as seen,might indicate a certain letter of the alphabet. A visual sighting platform between the walls is used to observe the signals. Artwork from 'Electricite' (1911) by Max de Nansouty,part of the 'Les merveilles de la science' series of 1867-1891 by Louis Figuier
Licence : Droits gérés
Crédit: Science Photo Library
Taille de l’image : 4997 px × 3561 px
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