Chemicals included calomel, turpeth mineral, flowers of sulphur, the mineral acids, preparations of steel and antimony, sugar of lead, and caustic potash. The inclusion of some of these may no doubt be attributed to the influence of Sir Theodore Mayerne. After the first Pharmacopœia had been several times reprinted a new one appeared in 1650. Notable features of this issue were that the gallon hitherto 9 lb. of water was now fixed at 8 lb.; corrosive sublimate and red and white precipitate were among the additions, but it has to be remarked that the white precipitate of that day was not what we know by name but really a precipitated proto-chloride of mercury. Its true chemical composition was not recognised until some fifty years later by Deidier in his “Chimie Raisonné.” Tinctures formed a new class of preparations, seven of them being formulated, castor, saffron, and strawberries being among these. Syrup of buckthorn was added to the syrups, and Gascoin powder to the powders. Mercury was now killed by turpentine. Mezereon, Winter’s bark, and cochineal were among the new drugs; antimonial wine made from the regulus of antimony was adopted; and the skull of a man killed by violence, and moss from that skull were admitted. The third Pharmacopœia (1677) did not present many remarkable features, and was apparently rather hastily produced. The most striking new formula it contained was one for “Aqua Vitæ Hibernorum sive Usquebagh.” Burnt alum, flowers of benzoin, balsams of capivi and tolu, contrayerva root, Jesuits’ bark, and resin of jalap were among the new drugs. Steel wine was added.