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Webster 1913 has another sense: "a treatise on colours". Is it attestable? Equinox 23:39, 23 September 2012 (UTC)

I suspect it to be a misunderstanding of the title of a famous book, Chromatography; or, a Treatise on Colors and Pigments, and of their Powers in Painting. I can find no non-dictionary citations. --Μετάknowledgediscuss/deeds 00:00, 24 September 2012 (UTC)