Tartarised iron has always been a favourite form for its administration. The Balls of Mars (boules de Mars, or boules de Nancy), still a popular medicine in France, are a tartarised iron prepared by a complicated process. First, a decoction of vulnerary species is made from 12 parts of water and 2 of the species. This is strained and poured on 12 parts of pure iron filings in powder. The mixture is evaporated to dryness and powdered. On this powder another decoction, 18 of water and 3 of species, is poured, and 12 parts of red tartar added. This compound is evaporated to the consistence of a firm paste, and a third decoction, 35 water and 5 species, is added to 25 of the paste and 25 of red tartar. This is evaporated to the proper consistence to make balls, which are usually about 1 oz. or 2 oz. in weight. They are kept to dry and then wrapped in wrapper. They are taken in doses of 4 to 5 grains much as Blaud’s pills are taken here. Sometimes the balls are dipped in water until a brown colour is imparted to the liquid. This water is also used as an application to bruises. Mistura Ferri Composita was adopted in the P.L., 1809, from the formula of his anti-hectic mixture which Dr. Moses Griffith, of Colchester, had published thirty or forty years previously. Paris quotes it as a successful instance of a medical combination which could not receive the sanction of chemical law; and he testifies to the opposition offered on that ground to its official acceptance, but adds that subsequent inquiry had proved that the chemical decompositions which constituted the objections to its use were in fact the causes of its utility. It yields a protocarbonate of iron in suspension, and a sulphate of potash in solution. The compound of iron is in the state in which it is most active. As evidence of the faith in ferruginous waters as tonics of the generative system, Phillips quotes from the thesis of Dr. Jacques, of Paris, a curious marriage contract said to have been common at one time among the burghers of Frankfort to the effect that their wives should not visit the iron springs of Schwalbach more than twice in their lives for fear of being too fruitful. The story looks suspiciously like an advertisement of Schwalbach.