Scientific American 51, 11.9.1847
We perceive by the London Mechanics' Journal, that a Mr. G. Gordon, of Leith, has got a patent for the manufacture of Cudbear, to supersede Archil for dyeing puce colors, &c This is something singular, as Cudbear has been used for this purpose by practical men for years. The Patent Office must have been ignorant of this fact.
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