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 of Berlin likewise made him tempting proposals, but Lemery could only feel at home in France. Things seemed quieter and he returned, only to find in a short time that the condition was worse for Protestants than ever. The Revocation of the Edict of Nantes prevented him from following either of his professions, pharmacy or medicine; and for their sake he adopted the Catholic faith. His "Universal Pharmacopœia" and his "Dictionary of Simple Drugs" were published after these troubles, and they are the works by which he won his lasting reputation.

Gilles François Boulduc (1675-1742) was for many years first apothecary to Louis XIV, and an authority on pharmaceutical matters in his time. By his essays he helped to popularise Epsom, Glauber's, and Seignette's salts in France.

Antoine Baumé (born at Senlis, 1728, died 1804), the son of an innkeeper, after an imperfect education in the provinces, got into the famous establishment of Geoffrey at Paris and made such good use of his opportunities that he became Professor of Chemistry at the College of France when he was 25. A practical and extraordinarily industrious chemist, he wrote much, invented the areometer which bears his name, founded a factory of sal ammoniac, and bleaching works for silk by a process which he devised. Baumé did good service, too, in dispelling many of the traditional superstitions of pharmacy, such as the complicated formulas and disgusting ingredients which were so common in his time. He was never content to accept any views on trust.

The three medallions which follow are those of Lavoisier, Berthollet, and Chaptal; great chemists whose right to be represented cannot be challenged,