A System of Theoretical and Practical Chemistry, Volume 2Old Compton Street, Soho, and G. Kearsley, Fleet Street [and 3 others], 1803 - Chemistry |
Contents
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Common terms and phrases
acetite acetous acid alcalies alcohol alloy alumine ammonia antimony arsenic barytes becomes bismuth blue boiling brittle called carbonic acid charcoal cobalt colour combination compound consists contains converted cool copper crucible crystals decomposed diluted disengaged dissolved distilled water ductile earths evaporated EXPERIMENT exposed filter fluid furnace fused fusible fusion glass glucine gradually grains grey hidrogen gas insoluble lead lime liquor magnesia malic acid manganese mass matrass melted mercury metal METHODS OF OBTAINING mixed mixture muriate of silver nitrate nitrate of potash nitric acid nitro-muriatic acid ounce oxalic oxid oxid of iron oxigenated muriatic acid phosphate phosphoric acid phosphorus Phosphuret plate platina powder precipitate produced PROPERTIES prussiate pure quantity RATIONALE...The red heat reduced retort salts saturated SECT separated silex specific gravity steel strontia substances sulphate sulphuret sulphuric acid surface tantalite tartrite of potash temperature tube unites vegetable vessel volatilized washed weight yellow zinc zircon
Popular passages
Page 153 - ... are rubbed, after which they are made red-hot, and then polished. The intention of this process appears to be little more than to apply the silver in a state of minute division to the clean surface of the copper, and afterwards to fix it there by fusion ; and, accordingly, this silvering may be effected by using the argentine precipitate, here mentioned, with borax or mercury, and causing it to adhere by fusion. The...
Page 169 - ... burned to tinder. Now, when any thing is to be gilded, it must be previously well burnished : a piece of cork is then to be dipped, first into a solution of salt in water, and afterward into the black powder ; and the piece, after it is burnished, rubbed with it.
Page 99 - 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.
Page 170 - ... bottles, and preserved for use. In order to gild iron or steel, the metal must first be well polished with the finest emery, or rather with the finest crocus martis, or colcothar of vitriol, and common brandy. The auriferous ether is then to be applied with a small brush ; the ether soon evaporates, and the gold remains on the surface of the metal. The metal may then be put into the fire, and afterwards polished. By means of this auriferous ether, all kinds of figures may be delineated on iron,...
Page 117 - ... pride of land, of sea, of air ; Furs, pearls, and plumes, the glittering thing displays, Dazzles our eyes, and easy hearts betrays." A salmon-rod should be about seventeen feet in length, the stock of ground-ash, the top of hazel ; it should be well looped with strings made of fine wire, and placed upon it, from one end to the other, in such a manner as that, when you lay your eye to one, you may see through all the rest. Through these rings your line must run, which will be kept in due position...
Page 191 - If it be a common bottle, the melted glass at the end of the tube is put into a mould of the exact size and shape of its body, and the neck is formed on the outside, by drawing out the ductile glass. If it be a vessel with a wide orifice, the glass in its melted state is opened and widened with an iron tool ; after which being again heated, it is whirled about with a circular motion, and by means of the centrifugal force thus produced, is extended to the size required.
Page 201 - ... attracts it into its pores, and the ware presently becomes dry. It is then exposed a second time to the fire, by which means the glaze it has imbibed is melted, and a thin glassy coat is formed upon its surface. The...
Page 191 - If a bottle is to be formed, the melted glass, at the end of the tube, is put into a mould of the exact size and shape of its body, and the neck is formed on the outside, by drawing out the ductile glass. ; If it be a vessel with a wide orifice, the glass, in its melted state, is opened and widened with an iron tool ; after which, being again heated, it is whirled about by a circular motion, till it is extended to the size required. If a handle, foot, or any thing else of the kind, be required, these...
Page 153 - ... of mercury, are triturated together, and made into a paste with water; with this, copper utensils of every kind, that have been previously boiled with tartar and alum, are rubbed, after which they are made red-hot, and then polished.
Page 170 - The gilding of iron by mere heat is performed by cleaning and polishing its surface, and then heating it till it has acquired a blue colour. When this has been done, the first layer of gold leaf is put on, slightly burnished down, and exposed to a gentle fire. It is usual to give three such layers, or four at the most, each consisting of a single leaf for common works, or two for extraordinary ones. The heating is repeated at each layer, and last of all the work is burnished.