Michiel 2005's photos with the keyword: claude chappe

Old telegraph

Old telegraph

Michiel 2005
19 Feb 2021 1 54
By changing the position of the arms in succession, a message could be sent over a distance, the message could be relayed by a system of telegraph towers. From: Louis Thomas, Kosmos für die Jugend: Die Denkwürdigsten Erfindungen Im neunzehnten Jahrhundert (1877)
Another Chappe telegraph

Another Chappe telegraph

Michiel 2005
19 Feb 2021 43
Claude Chappe was a Frenchman who invented the optical telegraph system in the late 18th century. From: Louis Thomas, Kosmos für die Jugend: Die Denkwürdigsten Erfindungen Im neunzehnten Jahrhundert (1877)