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Hering was surprised to see the blood of the King crab that he dissected, blue, which on investigation, was found to contain copper as he had surmised and which he thought would prove to be another medicine for Cholera. Further provings are necessary to establish this, though symptoms so far observed make this probable. Hering's fertile mind always lead him to pioneer paths into practical therapeutics. [Boericke]
Among the symptoms recorded the most notable was a rush of blood to the face, with heat of face and over whole body, recalling a similar symptom of Ast. r., another sea-animal.[Clarke]