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 and Dr. Johnson said of him: "No man brought more mind to his profession." Dr. Munk, in his "Roll of the College of Physicians," adds to this, however: "But he tarnished the fair fame he might otherwise have attained by patenting his powder and falsifying the specification." Dr. James died in 1776 at the age of 73.

The patent for his fever powder was taken out in 1747. It is on record that Johnson introduced him to John Newbery, a noted bookseller of the time, who had a shop at the corner of St. Paul's Churchyard and Ludgate Hill. Newbery became the agent and part proprietor of the medicine. It is still owned and prepared by the direct descendants of John Newbery, who carry on business in Charterhouse Square.

The specification of the patent directs to "Take antimony, calcine it with a continual protracted heat in a flat unglazed earthen vessel, adding to it from time to time a sufficient quantity of any animal oil and salt well dephlegmated; then boil it in melted nitre for a considerable time, and separate the powder from the nitre by dissolving it in water." The doctor adds to his specification a process for a mercurial pill with antimony, made by amalgamating equal parts of martial regulus of antimony with "pure silver" (sic), adding a proportionable quantity of sal ammoniac, then distilling off the mercury and using it again. This performance was to be repeated nine or ten times, the mercury being at last dissolved in spirits of nitre (nitric acid), distilled to dryness, the caput mortuum calcined till it was of a golden colour, and this powder, after spirits of wine had been burnt upon it, was ready to be made into pills. Dr. James gave the moderate dose of the antimonial powder at 30 grains, and that of the mercurial at 1 grain.

Paris says that James "usually combined his anti