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Scottish National Dictionary (1700–)

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About this entry:
First published 1976 (SND Vol. X, list of scientific terms with Scottish connections).
This entry has not been updated since then but may contain minor corrections and revisions.

THOMSONITE. Geol. 1. A species of zeolite (H. J. Brooke in Annals Philosophy (1820) XVI. 193); 2. A siliceous carbonate of calcium and magnesium (P. Squires in Id. (1821) II. 254).

[After Thomas Thomson (1773–1852), of Crieff, chemist and geologist.]

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