heliograph
The Century Dictionary: The Encyelopedic Lexicon of the English Language · 1887 · p. 118
(hé’li-6-graf), n. [ Helictis (he-lik’tis),. [NL.,
Bu kavram başka kaynaklarda da geçiyor
Adair's New Encyclopedia (1923)
A Dictionary of Military Terms (1918)
Chamber's Twientieth Century Dictionary (1908)
The Optical Dictionary (1904)
Chandler's Encyclopedia (1898)
The Standart Electrical Dictionary (1892)
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