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 death from 36 grains; Wildberg has related a fatal case caused by little more than half an ounce of the Berlin tincture, which contains the soluble matter of forty grains; and Mr. Skae has mentioned a case fatal in about thirteen hours, where the dose seems to have been well ascertained not to have exceeded half an ounce of common laudanum, or about twenty grains of opium. Dr. Paris, without quoting any particular fact, says four grains may prove fatal. I should have felt some difficulty in admitting this statement, as I have repeatedly known persons, unaccustomed to opium, take three or four grains without any other effect than sound sleep. But I have been favoured with the particulars of a case by Mr. W. Brown of this city, where a dose of four grains and a half, taken by an adult along with nine grains of camphor, was followed by the usual signs of narcotism, and death in nine hours. The man took the opium for a cough at seven in the morning; at nine his wife found him in a deep sleep, from which she could not rouse him; nothing was done for his relief till three in the afternoon, when Mr. Brown found him labouring under all the usual symptoms of poisoning with opium, contracted pupils among the rest; and death ensued in an hour, notwithstanding the active employment of remedies. On examining the body no morbid appearance was found of any note except fluidity of the blood,—a common appearance in those who have died of the effects of this drug.

It is more important than may at first sight be imagined to acquire an approximative knowledge of the smallest fatal dose. For, in consequence of the dread entertained of opium by many unprofessional persons, it is currently believed to be much more active than it is in reality; and instances of natural death have been consequently imputed to medicinal doses taken fortuitously a short time before. The facts stated above comprehend the only precise information I have been able to collect as to the smallest fatal doses in adults. I may add some farther observations, however, on the smallest fatal doses in children. Very young children are often peculiarly sensible to the poisonous action of opium, so that it is scarcely possible to use the most insignificant doses with safety. Sundeling states in general terms that extremely small doses are very dangerous to infants on account of the rapidity of absorption. This opinion is amply supported by the following cases.—An infant three days old got by mistake about the fourth part of a mixture containing ten drops of laudanum. No medical man was called for eleven hours. At that time there was great somnolency and feebleness, but the child could be roused. The breathing being very slow, artificial respiration was resorted to, but without advantage: the child died in twenty-four hours, the character of the symptoms remaining unchanged to the last. At the inspection of the body, which I witnessed, no morbid ap-*