Nathaniel Godbold’s Vegetable Balsam was patented in 1785, Spilsbury’s Anti-scorbutic Drops in 1792, Ching’s Worm Lozenges in 1796, and Innocenza della Lena winds up the century with a formula conceived quite on the lines of the pharmacy then departing. It was for “A certain medicine called flogistical and fixed earth of Mars or powder of Mars.” It is not stated what the medicine was for, but its preparation was awe-inspiring. Mineral earth of iron, copper, crude antimony, mineral salt, and urine were digested for a considerable time in an unvarnished vessel, hermetically sealed, deep down in the earth. Subsequently the mixture was exposed to the rays of the sun for a period, more urine was added, and the interment and the exposure were several times repeated. Roche’s Embrocation for whooping-cough, patented in 1803, was declared to be compounded of oil of elder, rose leaves, chamomile flowers, oil of caraway, oil of rosemary, cochineal, and alkanet root. This remedy is still popular, but it is understood to have a composition very different from that specified. Perkins’s Metallic Tractors were patented on March 10th, 1798. Benjamin Douglas Perkins claimed to have discovered “an art of relieving and curing a variety of aches, pains, and diseases in the human body, by drawing over the parts affected or those contiguous thereto, in certain directions, various pointed metals, which from the affinity they have with the offending matter,” or from some other cause, “extract, or draw out the same, and thus cure the patient.” The metals used were combinations of copper, zinc, and gold; or of iron, silver, and platinum. The tractors were invented by Elisha Perkins, the father of Benjamin, who died at New York in 1799. The tractors were united together like a pair of compasses, and one of the arms was obtuse and the other pointed. They professed to apply galvanic action to the relief and cure of pain and disease. Galvani’s report of his experiments was only published about 1790, and not much earlier Mesmer’s animal magnetism had excited marvellous interest in Paris. Perkins’s Tractors had an enormous popularity for a time in England and in Denmark, but nowhere else to any extent. Two Bath doctors, named Falconer and Haygarth, professed to get as good results with tractors made of wood, many patients of the Bath Hospital declaring that these promptly relieved their pains. From these experiments it was argued that the alleged cures were entirely due to the imagination of the sufferers.