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 changed to Pilulæ ex Colocynthide cum Aloe, and the formula ordered Socotrine aloes and scammony, of each 2 oz.; pulp of colocynth 1 oz.; oil of cloves, 2 drachms.

Pil. Calomel. Co. originated from a formula devised by Dr. Andrew Plummer, Professor of Chemistry in the University of Edinburgh in the middle of the eighteenth century. Dr. Plummer first published his formula in the "Edinburgh Medical Essays," 1751. It was only a slight modification of the Pilulæ Æthiopicæ which were already official in the Edinburgh Pharmacopœia. These were originally a combination of Ethiops Mineral with the golden sulphide of antimony, but the Edinburgh College had substituted calomel for the former.

Under this name Mr. Joseph Ince recorded in the ''Pharm. Journ.'', June 13th, 1874, that a preparation was made and called by this name which was a solution of 1 grain of sulphate of quinine in one drachm of compound spirit of ammonia. This did not meet with general approval, and in 1853 Mr. Bastick proposed an Ammoniated Solution of Quinine made by dissolving 32 grains of sulphate of quinine in 3-1/2 ounces of proof spirit and 1/2 ounce of solution of ammonia. The present B.P. tincture contains less ammonia, and alcohol is employed instead of proof spirit.

Pil. Sapon. Co., formerly official as Pil. Sapon. c Opio, Pil. Opii, Pil. ex Opio, and when first authorised in the