SINCE 1828
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chemical telegraph

noun
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Definition of chemical telegraph

: a telegraphic apparatus by which a message is recorded on a moving slip of paper moistened with a solution having a chemical composition that is altered on the passage of current through a stylus

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Cite this Entry

“Chemical telegraph.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chemical%20telegraph. Accessed 25 Jun. 2022.

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