the right thigh of a woman was an excellent aid to delivery in child-birth; if given to dogs, cooked or raw, it would cure mange. The fat was a valuable application in gout, or for tumours. Those treatments he had verified by his own experience. Other virtues attributed to vipers were mentioned, but he had not proved them, and could not conscientiously guarantee their existence. One was that the person who swallowed the liver of a viper could not be bitten by any kind of serpent during the ensuing six months.
Madame de Sévigné, was a firm believer in the medicinal value of vipers. Writing to her daughter in 1679 she says: "Madame de Lafayette is taking viper broth, which much strengthens her eyesight." In 1685 she informs her son: "It is to vipers I am indebted for the abundant health I now enjoy. They temper, purify, and refresh the blood. But it is essential to have the vipers themselves, and not the powder, which is heating unless taken in broth, boiled cream, or something refreshing." Then she goes on to advise him to get M. de Boissy to send him ten dozen vipers from Poitou in a case divided into three or four compartments lined with hay and moss, so that they can be kept at their ease. He is to take two every morning. The heads are to be cut off, the bodies to be scalded and cut into small pieces, and used to stuff a fowl. He is to continue this treatment for a month.
The early London Pharmacopœias gave the following form for the Trochisci Viperum required in the preparation of Theriaca: Remove the skin, entrails, head, fat and tail, and boil the flesh of vipers in 8 oz. of water with dill and a little salt, add 2 oz. of white bread twice toasted, ground and sifted, and make into
