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1 Noun 1 Verb 0 Adj. 0 Adv.
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ENheliographNoun
EN
An apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
bn:00043584n Concept
English:
messaging
ENheliographVerb
EN
Signal by means of a mirror and the using the sun's rays
bn:00089306v Concept

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