The Elements of Medical Chemistry: Embracing Only Those Branches of Chemical Science which are Calculated to Illustrate Or Explain the Different Objects of Medicine, and to Furnish a Chemical Grammar to the Author's Pharmacologia

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Collins & Hannay, 1825 - 471 pages
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Page iii - Alas ! What an inconsiderable creature am I in this prodigious ocean of waters ! My existence is of no concern to the universe ; I am reduced to a kind of nothing, and am less than the least of the works of God.
Page 126 - ... till it crystallizes on cooling. Alter the position of every crystal, once at least every day, with a glass rod, that all the faces may be alternately exposed to the action of the liquid ; for the face on which the crystal rests never receives any increase.
Page 125 - The salt to be crystallized is to be dissolved in water, and evaporated to such a consistency that it shall crystallize on cooling. Set it by, and when quite cold pour the liquid part off the mass of crystals at the bottom, and put it into a flat-bottomed vessel.
Page 212 - I / vapour playing on the bottom of the capsules heats them to any required temperature ; and being itself continually condensed, it runs back into the kettle to be raised again in ceaseless cohobation. With a shade above to screen the vapour chest from soot, the kettle may be placed over a common fire. The orifices not in use are closed with tin lids. In drying precipitates, the tube of a glass funnel may be corked and placed with its filter directly into the opening of a proper size.
Page 159 - they were in large flocks containing both species in the proportion of two of the former to one of the latter " (the present)
Page iv - The drop, says the fable, lay a great while hardening in the shell, until by degrees it was ripened into a pearl, which falling into the hands of a diver, after a long series of adventures, is at present that famous pearl which is fixed on the top of the Persian diadem.
Page 323 - Mr. Spalding, the celebrated diver, observed, that whenever he used a diet of animal food, or drank spirituous liquors, he consumed in a much shorter time the oxygen of the atmospheric air in his diving-bell ; and therefore he had learned from experience to confine himself to a vegetable diet, and to water for drink, when following his profession.
Page 373 - ... instantly ; and its deadly agency is rapidly exerted when put in contact with any of the tissues of the body, through which it penetrates with astonishing rapidity. Even when mixed with a portion of air, it has proved immediately destructive. Dr. Paris refers to the case of a chemist of his acquaintance, who was suddenly deprived of sense as he stood over a pneumatic trough in which he was collecting this gas. From the experiments of Dupuytren and Thenard, air that contains a thousandth part...
Page 358 - ... a capacious receiver is luted to the retort, and six pints are distilled over. The specific gravity of the product is 0-995: it must be preserved in bottles excluded from the light, and being subject to decomposition, should not be prepared in large quantities at a time.
Page 582 - The fermentation and putrefaction of organized substances in the free atmosphere, are noxious processes; beneath the surface of the ground they are salutary operations. " In this case, the food of plants is prepared where it can be used ; and that which would offend the senses and injure the health, if exposed, is converted by gradual processes into forms of beauty and of usefulness ; the fetid gas is rendered a constituent of the aroma of the flower, and what might be poison, becomes nourishment...

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