The use of corrosive sublimate, the bichloride of mercury, is certainly restricted within very confined limits, and even within those limits, the information we have is very meagre. At Constantinople, the opium-eater, who finds his daily dose insufficient in time to produce those results which at first accrued from its use, resorts to the expedient of mixing therewith a small quantity of corrosive sublimate, to increase the potency of the drug. By itself, it is never indulged in as a passion in the same manner as vegetable narcotics, nor can the same pleas be urged in favour of its use, or in extenuation of its abuse. An opium-eater at Broussa is stated to have been accustomed to swallow daily with his opium, forty grains of corrosive sublimate without any apparently injurious effects. In South America its use is affirmed to be very extensive. Arsenious acid, or white arsenic, is a more popular irritant than mercury. The arsenic-eaters of Styria are now historical individuals, and the custom there and in the neighbouring districts appears to be a common one among the labouring population. Itinerant pedlars vend it for this purpose, and it becomes a necessary of life to those who commence the practice. It is taken every morning as regularly as the Turk consumes his opium. One of the benefits said to accrue from its use is, that it gives a plumpness to the figure, softness to the skin, freshness to the complexion, and brilliancy to the eye. For this purpose, young men and maidens resort to it, to increase their charms, and render themselves acceptable and fascinating to each other. A friend, recently returned from Canada and the United States, informs us, positively, that it is largely consumed by the young ladies, in those regions of the civilized world, for the same purposes above described, to which it is resorted by the Austrian damsels. He declares that the custom is so common that no surprise is excited on discovering any one addicted to its use, and that amongst the fairer sex it is the rule rather than the exception.