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Of The Gold Coast The Cape And Natal Turacine The Name Proposed








for it, is noticed here only because it is the first animal or vegetable
pigment, with copper as an essential element, which has been hitherto
isolated. The colour is extracted by solution in an alkali, and
precipitation by an acid, and is changed on long exposure to air and
moisture to a green hue. As the entire plumage of a bird yields not more
than three grains of pigment, turacine must be looked upon as a mere
curiosity.





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Previous: Copper Reds



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