Optical telegraphy

Optical telegraphy

V400/0104 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 18.2MB

Downloadable file size: 2.4MB

Price image Pricing

Please login to use the price calculator


Credit: CCI ARCHIVES/SCIENCE PHOTO LIBRARY

Caption: Optical telegraphy. Historical artwork of French soldiers using a device for optical telegraphy (sending and receiving messages using light). One such early device was the Mangin projector, which was invented in the early 1880s. The visibililty of the signal varied from 20-100 kilometres, and depended on the weather and if it was day or night. Early devices used oil lamps at night, but this later device is using a battery (below lamp) to power an electric light. The soldier at lower right is recording a message. Optical telegraphy was soon replaced by electrical telegraphy. This is a French artwork in a series on the history of electricity, published in the early 20th century.

Release details: Model release not required. Property release not required.

Keywords: 1800s, 1900s, 19th century, 20s, 20th century, 30s, adult, adults, apparatus, army, artwork, battery, caucasian, communicating, communication, communications, decoding, device, electric, electrical, electricity, equipment, europe, flashing, france, french, historical, history, human, humans, illustration, lamp, male, man, mangin projector, men, military, officer, officers, optical, projector, recording, sending, signal, signalling, soldier, soldiers, technological, technology, telecommunication, telecommunications, telegraph, telegrapher, telegraphy, thirties, transmitting, twenties, visual, war, writing

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.