DescriptionHeliograph (1).jpg English: Heliograph Date 10 May 2007, 11:51 Source Heliograph Author Jithra Adikari from Calgary, Canada...
truetrue This image is a derivative work of the following images: Image:Heliograph (1).jpg licensed with Cc-by-sa-2.0 2008-06-11T15:13:32Z Waldir 1024x768 (341409...
September 2018 English US Forest Service lookout using a Colomb shutter type heliograph in 1912 at the end of a telephone line operator: Flickr described at URL:...
English British Signallers Training with Heliograph in the Desert at Helwan Egypt, June 17 1940 French ation des signaleurs britanniques avec héliographe...
tie is below the mirror English author name string: Heliograph URL: https://commons.wikimedia.org/wiki/user:Heliograph Wikimedia username: Heliograph...
It was copied to Wikimedia Commons using Flickypedia by Heliograph on 28 December 2023. English Three 8th Australian Light Horse signallers...
English Instruction on the heliograph (Tadworth Camp), First World War, England...
English British signallers with heliograph at advanced headquarters at Kara Tepe, Mesopotamia, ca. Dec. 6, 1917...
English British heliographing from the Johannesburg Fort the News of the occupation - Boer War, S. Africa , (c) 1901 by Underwood and Underwood, New York...
Creative Commons Attribution-Share Alike 4.0 truetrue English Preparing a heliograph at Elandskop, a hill near Petrus Steyn, Free State, South Africa Afrikaans...
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