Bible Dictionaries
Pyrognostics
Webster's Dictionary
(n. pl.) The characters of a mineral observed by the use of the blowpipe, as the degree of fusibility, flame coloration, etc.
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Bibliography Information
Webster, Noah. Entry for 'Pyrognostics'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/p/pyrognostics.html. 1828.