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 strained opium, 2 oz., saffron 1 oz., cinnamon and cloves of each 1 drachm, and Canary wine, 1 pint.

"I do not think this preparation has more virtue than the solid laudanum of the shops," he wrote; "but I prefer it before that for its more commodious form, and by reason of the greater certainty of the dose, for it may be dropped into wine or any distilled water, or into any other liquor."

This passage is quoted from Pechey's translation of Sydenham's works. The allusion to "the solid laudanum of the shops" confirms the opinion that Sydenham's was the first liquid preparation generally designated laudanum. Among the Sloane manuscripts in the British Museum is included what is described as "The Commonplace Book of an Apothecary at Great Dunmow," which contains several more or less similar recipes for laudanum. The book is dated 1644-5. The most elaborate formula is headed "Laudanum Josephi Michælis," and lengthy directions for making this are given. The ingredients were opium, extract of henbane, species diambræ (a compound of most of the known spices), pearls, coral, amber, musk, mummy, cloves, and oil of cloves. Some of these were to be extracted with spirit of wine, and the spirituous extracts were to be distilled. Ultimately the whole was to be set aside to ferment for three months. The dose was stated to be 4 or 5 grains at bedtime.

Rousseau's laudanum, which also became famous among opium preparations, differed from others in being a fermented compound. It was made by dissolving 12 oz. of honey in 3 lb. of warm water, and setting the mixture in a warm place. When it began to ferment, 4 oz. of opium mixed with 12 oz. of water were added, and the fermentation was allowed to continue at a