Conceding that the use of the mummy in medicine is one of the strangest and most extravagant abuses of empyricism, the officinal mummy of _Crollius_ must be considered as an improvement, inasmuch as it is divested of the dangers attached to other mummies; it was even a benefit, for this remedy divested of the marvellous, reduced to the level of a common drug, was justly appreciated and soon forgotten. The art of embalming among the Egyptians and Guanches, was carried to a degree of perfection attained by no other nation who followed their example. And, nevertheless, what are the mummies of these countries? They are, according to the definition of R. P. Kircher, bodies stuffed and filled with odoriferant, aromatic, and balsamic drugs, capable of arresting the progress of putrid decomposition. Numerous incisions enabled the preservative matter to enter the cavities and deep tissues: agreeably to the relations of Herodotus, of Diodorus Sicculus, and of Porphyrus, the cranium was emptied either through the nostrils, or by an opening made in one of the orbits: the contents of the thorax and abdomen were withdrawn and placed in a trunk. “The Egyptians,” says Plutarch, “drew the intestines from the dead bodies, and, after having exposed them to the sun, cast them away as the cause of all the sins committed by man.” The moderns have adopted an analogous mode of preparation, and in our days, previous to my researches on the preservation of animal matters, the processes of embalming were long and complicated. In the Dictionary of Medicine, of twenty-five volumes, (_Paris_, 1835,) M. Murat traces in these terms the rules for embalming: “Before commencing this operation, it is necessary to procure the following objects: alcohol saturated with camphor, camphorated vinegar, a varnish composed of the balsams of Perou and copaiba, fluid styrax, the oils of Muscat, of lavender, and of thyme, &c., alcohol saturated with proto-chloride of mercury, a powder composed of tan, of decrepitated salt, of quinquina, of cascarilla, of mint, of benzoin, of castor, of Jew’s pitch, &c.--all these substances mixed and reduced to a fine powder, are sprinkled with essential oils. The powdered tan ought to form nearly half the weight, and the salt one-fourth; there ought also be placed, at the disposition of the embalmer, a certain number of bandages, linen, sponges, and waxed threads, also several basins filled with pure water, &c.