A heliograph (Greek: Ἥλιος helios, meaning "sun", and γραφειν graphein, meaning "write") is a wireless solar telegraph that signals by flashes of ...
The thing was a heliograph making talk, as it supposed, to the preacher, and Jim watched harder than ever.
Heliography (in French, héliographie) is the photographic process invented by Joseph Nicéphore Niépce around 1822,  which he used to make the earliest known ...
Heliographic Warfare. Primarily used as a technology of warfare, the design of the Heliograph can be seen as closely addressing the demands of battle, but also ...
Signaling By Signal Lamp: I am sending the pictures with the lamp with this. They do not have a special caption, they are a part of an photo article on army ...
heliograph (hē`lēəgrăf) [Gr.,=sun-writer], signaling device using flashes of sunlight. It has two mirrors that are used to reflect sunlight on a distant point and ...
If you like it, please consider the Heliograph version, which restores a third of the original manuscript and contains all new art and graphics!
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It was a lieutenant and a couple of privates of the 8th Hus- sars, with a stand like a theodolite, which the artilleryman told me was a heliograph.
The First Photograph Finally, in 1826 or 1827 the chemical process, the power of the camera, the successful quest for permanence, and the combined curiosity and ...