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Show TTie Lobater'a (Jucer Coat. Tho sholl of tho orab and lobster owes Its bluish-gray color to tbo superposition super-position of two plgraonts or coloring-matters, coloring-matters, which havo boon Isolated a rod pigment and a bluo ono. As long-as long-as thoso two pigments exist simultaneously simultane-ously tho crustaceans romaln gray. But tho bluo plgmont Is fugitive and somo-tlracs, somo-tlracs, undor tho Influences of a disease, it la dostroyod, and crabs aro found with portions of their shell moro or loss" reddish. Whon tho orustacoans aro Immersed In boiling water tho bluo plgmont plg-mont Is entirely dostroyod, and tho red plgmont, which is vory stablo, appoara alono in all its brilliancy. |