The Elements of Experimental Chemistry, Volume 2

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Baldwin, Cradock and Joy, and R. Hunter, 1823
 

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Pagina 573 - OF MERCURY. All the oxides and saline compounds of mercury laid in a drop of marine acid on gold with a bit of tin, quickly amalgamate the gold. A particle of corrosive sublimate, or a drop of a solution of it, may be thus tried. The addition of marine acid is not required in this case. Quantities of mercury may be rendered evident in this way which could not be so by any other means.
Pagina 140 - The degree of purity of gold is expressed by the number of parts of that metal, contained in the 24 parts of any mixture. Thus gold, which in 24 such parts (termed carats,) contains 22 of the pure metal is said to be 22 carats fine. Absolutely pure gold, using the same language, is 24 carats fine ; and gold alloyed with an equal weight of another metal, 12 carats fine-t Platinum.
Pagina 163 - For in the functions of a living plant, a directing principle appears to be concerned, peculiar to animated bodies, and superior to, and differing from, the cause which has been termed chemical affinity.
Pagina 605 - WEIGHTS. The Paris pound, poids de mark of Charlemagne, contains 9216 Paris grains : it is divided into 16 ounces, each ounce into 8 gros, and each gros into 72 grains*. It is equal to 7561 English Troy grains. The English Troy pound, of 12 ounces, contains 5760 English grains, and is equal to 702 1 Paris grains.
Pagina 627 - NB — If the materials are mixed at a warmer temperature than that expressed in the table, the effect will be...
Pagina 119 - One hundred grains (or a greater proportional quantity, not exceeding 500) are to be dissolved, with heat, in a measured ounce and a half of nitric acid. This solution being poured cold upon two measured ounces of alcohol, previously introduced into any convenient glass vessel, a moderate heat is to be applied till effervescence is excited.
Pagina 535 - Journal, vi. 317) proposes the following process: " To the muriatic or nitric solution of lime and magnesia, add sulphate of ammonia in sufficient quantity; evaporate the mixture gradually to dryness, and then heat it to redness till it ceases to lose weight, by the volatilization of the muriate or nitrate of ammonia formed: note the weight of the mixed salt, reduce it to powder and wash it with a saturated solution of sulphate of lime till all the sulphate of magnesia appears to be dissolved; dry...
Pagina 56 - The yellow mass thus obtained must then be dissolved in hot water, and the liquor filtered in order to separate it from the sediment. After this it must be diluted with water, and sulphuric acid poured upon it of such a strength as to produce a fleecy precipitate of a superb yellow colour, which on being washed on a cloth freely dissolves in ammonia, and yields a yellowish liquor: into this is poured an excess of ammonia so as to discolour it entirely. The dye is then obtained, and any shade may...
Pagina 54 - A mixture of oxymuriate of potash and arsenic furnishes a detonating compound, which takes fire with the utmost rapidity. The salt and metal, first separately powdered, may be mixed by the gentlest possible triture, or rather by stirring them together on paper with the point of a knife. If two long trains be laid on a table, the one of gunpowder and the other of this mixture, and they be in contact with each other at one end, so that they may be fired at once, the arsenical mixture burns with the...
Pagina 119 - The solution being poured cold upon two measured ounces of alcohol, previously introduced into any convenient glass vessel, a moderate heat is to be applied till effervescence is excited. A white fume then begins to undulate on the surface of the liquor, and the powder will be gradually precipitated on the cessation of action and re-action.

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