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 Quatuor" was included, while the London Pharmacopœias of the same period provided an alkaline infusion, and an "Infusum Sennæ Limoniatum," containing lemon peel and lemon juice with the object of making the draught less nauseous.

The modern combination of sulphate of magnesia with an infusion or tincture of senna, and sometimes with manna, sometimes with ammonia, and always with some aromatic ingredient, began to be used about the beginning of the nineteenth century. The earliest mention of the term "black draught" that I have met with is in Paris's "Pharmacologia," 1824. It was dropped out from later editions. The mixture was called "black dose" in Brande's "Materia Medica and Pharmacy," 1839. The phrases "black draught" and "blue pills" were not given as synonyms in the Pharmacopœia until 1885. They are essentially English. Dorvault gives a formula (practically the Mist. Sennæ Co.) entitled "Potion Noire Anglaise," and Hager has "Pilulæ Hydrargyrosæ seu pilulæ ceruleæ Anglorum."

These pills are probably taken in larger numbers than any other pills sold in Great Britain. If in proper condition they present iron in the form of the proto-*carbonate, either formed in the pills, or perhaps partially or entirely in the stomach. They are similar to Griffiths' pills, which were the popular Mist. Ferri Co. in pilular form. Dr. J. Blaud, a French provincial practitioner, in an article published in the Revue Medicale, in 1831, entitled "Memoires sur les Maladies Chlorotiques," gave the following formula:—

"Gummi Arabici, 5 grammes; solve calore baln.