Compare Bacon (Natural Hist. 965):  “I would have trial made of two other kinds of bracelets, for comforting the heart and spirits:  one of the trochisch of vipers, made into little pieces of beads; for since they do great good inwards (especially for pestilent agues), it is like they will be effectual outwards, where they may be applied in greater quantity.  There would be trochisch likewise made of snakes; whose flesh dried is thought to have a very good opening and cordial virtue.”  Ib. 969:  “The writers of natural magic commend the wearing of the spoil of a snake, for preserving of health.”  Thomas Jackson (On the Creed, VIII. 8, § 4):  “The poisonous bitings of the scorpion are usually cured by the oil of scorpions.”