The shell of. the lobster is imbued with a black or bluish pigment, secreted by the true skin, which also gives out the calcareous matter after each moult, so that lime and pigment are blended together. The pigment becomes red, pale and intense, in water at a temperature of 212 degrees Fahrenheit, and the same effect is produced by the action of alcohol, ether, and various acids.
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Auckland Star, Volume LXII, Issue 106, 7 May 1931, Page 19
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67Untitled Auckland Star, Volume LXII, Issue 106, 7 May 1931, Page 19
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