A System of Chemistry for the Use of Students of Medicine

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Printed and published for the author, 1819 - 624 pàgines

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Pàgina 309 - It is white and transparent ; specific gravity 1.74. It converts vegetable blues to green. Its taste is sweetish and alkaline. It is soluble in twenty times its weight of water, at the temperature of 60°, and six times its weight of boiling water. When exposed to the air, it effloresces slowly and slightly. When heated, it swells, loses about four tenths of its weight, becomes ropy, and then assumes the form of a light, porous and very friable mass, known by the name of calcined borax: in a strong...
Pàgina 302 - The salt, when heated to 100°, gives oft" only 23-81 per cent of water, assuming a light blue colour. — It dissolves in not less than 200 parts of cold water, and in a much smaller quantity of boiling water; but the hot solution deposits nothing on cooling, till it is evaporated to a syrupy consistence. If however the solution be evaporated over the water-bath, there remains an amorphous mass of the green modification, which dissolves...
Pàgina 306 - Sulphate of zinc is insoluble in alcohol, but it dissolves in two and one-third parts of cold water and in less than its own weight of boiling water.
Pàgina 297 - When more strongly heated, it yields a sublimate of sulphite of ammonium (Berzelius.) It dissolves in from 40 to 50 parts of cold water, and in a much smaller quantity of hot water (Crum), and is precipitated from the solution by the alkaline sulphates and some other salts, but much less completely than the potassium-salt.
Pàgina 294 - It is soluble in 18 parts of cold water and in rather less than its own weight of boiling water.
Pàgina 501 - Manchester, has made some curious and important experiments on the connexion between the temperature of caoutchouc and its elasticity, from which it results that ductility as well as fluidity is owing to latent heat.* Caoutchouc is not altered by exposure to the air. It is perfectly insoluble in water ; but if boiled in water...

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