bn:01432499n
Noun Concept
Categories: 1820s in science, Photographic processes dating from the 19th century, Printmaking, Audiovisual introductions in 1822, 1820s in art
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heliography
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Heliography from helios, meaning "sun", and graphein, "writing"1826 or 1827 Wikipedia
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EN
Heliography from helios, meaning "sun", and graphein, "writing"1826 or 1827 Wikipedia
The photographic process used to make the earliest known permanent photograph from nature Wikipedia Disambiguation
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