Applied Chemistry: Manufacture of glass. Starch. Tanning. Caoutchouc; its properties and applications. Borax and the boracic lagoons. Soap. Sulphur and sulphuric acid. Soda manufactureEdward Andrew Parnell Taylor and Walton, 1844 |
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Seite 11
... cooling them suddenly by immersion in cold water ; after being thus treated , the mineral may be pounded in a steel mortar with facility . When pounded , it should be put to digest in a little muriatic acid to get rid of the particles ...
... cooling them suddenly by immersion in cold water ; after being thus treated , the mineral may be pounded in a steel mortar with facility . When pounded , it should be put to digest in a little muriatic acid to get rid of the particles ...
Seite 13
... cooled quickly or slowly . The only silicates which are soluble in water are those of potash and soda . The substance called soluble glass , a solution of which has been applied to paper , cloth , wood , & c . , to prevent or retard ...
... cooled quickly or slowly . The only silicates which are soluble in water are those of potash and soda . The substance called soluble glass , a solution of which has been applied to paper , cloth , wood , & c . , to prevent or retard ...
Seite 20
... cooled to the ordinary temperature soon after it is formed , the brittleness of the glass is increased to such an extent that a small change of temperature or the merest scratch is apt to cause the vessel to fly to pieces . The two ...
... cooled to the ordinary temperature soon after it is formed , the brittleness of the glass is increased to such an extent that a small change of temperature or the merest scratch is apt to cause the vessel to fly to pieces . The two ...
Seite 21
... cooled glass are not difficult of explanation ; they are produced merely by the unequal contraction of different parts of the same vessel through an unequal rate of cooling . Owing to the imperfect conducting power of glass , the ...
... cooled glass are not difficult of explanation ; they are produced merely by the unequal contraction of different parts of the same vessel through an unequal rate of cooling . Owing to the imperfect conducting power of glass , the ...
Seite 22
... cooled , the Bologna phial and Prince Rupert's drops may be entirely deprived of their extreme sus- ceptibility of breaking . The glass experiences an increase in density by this treatment , which shews that an approximation of the ...
... cooled , the Bologna phial and Prince Rupert's drops may be entirely deprived of their extreme sus- ceptibility of breaking . The glass experiences an increase in density by this treatment , which shews that an approximation of the ...
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Applied Chemistry: Manufacture of Glass. Starch. Tanning. Caoutchouc; Its ... Edward Andrew Parnell Keine Leseprobe verfügbar - 2013 |
Häufige Begriffe und Wortgruppen
afford alkali allowed ammonia applied bark becomes boiling boracic acid borax calcined caoutchouc carbonate of soda carbonic acid catechu caustic cent chamber chemical cold water colouring matter colourless common salt compound consists contains cooling crystals decomposed decomposition deposit dextrin diameter diastase dilute dissolved distillation dried employed evaporation exposed Fahr feet fermentation furnace gallic acid gelatinous tissue glass gluten grains granules heat hides hydrogen impurities inches infusion insoluble introduced iodine iron layers leather lime liquid liquor manner manufacture mass metallic mixed mixture muriatic nitre nitric acid oak-bark obtained oil of vitriol operation oxide oxygen peroxide placed plate potash potatoe starch pounds powder precipitate prepared produced proportion pure pyrites silicic acid skins small quantity soap soda-ash soluble specific gravity starch sugar substance sugar sulphuret sulphuric acid sumach surface tained tan-liquor tannin tanning material temperature thickness tion vapour variety vegetable vessel washed weight wheat
Beliebte Passagen
Seite 8 - Yet by some such fortuitous liquefaction was mankind taught to procure a body at once in a high degree solid and transparent, which might admit the light of the sun, and exclude the violence of the wind: which might extend the sight of the philosopher to new ranges of existence, and charm. him at one time with the unbounded extent of the material...
Seite 8 - Who, when he saw the first sand or ashes, by a casual intenseness of heat, melted into a metalline form, rugged with excrescences, and clouded with impurities, would have imagined, that in this shapeless lump lay concealed so many conveniences of life, as would in time constitute a great part of the happiness of the world...
Seite 9 - ... old age with subsidiary sight. Thus was the first artificer in glass employed, though without his own knowledge or expectation. He was facilitating and prolonging the enjoyment of light, enlarging the avenues of science, and conferring the highest and most lasting pleasures ; he was enabling the student to contemplate nature, and the beauty to behold herself.
Seite 351 - East, with these, exchanging them for raw cotton, silk, wine, raisins, indigo, &c., &c., we can understand why the English government should have resolved to resort to war with Naples, in order to abolish the sulphur monopoly, which the latter power attempted recently to establish. Nothing could be more opposed to the true interests of Sicily than such a monopoly; indeed, had it been...
Seite 198 - ... four feet below the surface of the ground. This serves both as a drain for discharging the water of the vault, and to admit damp, cool air, to supply the place of that which has become rarefied, and thus keep up a current through the ventilator at top. The ridge of the roof may be level with the surface of the ground; on the ridge, and extending its whole length, set up two planks, edgewise, two inches apart.
Seite 199 - In the course of a few days, when the hair begins to loosen upon the upper parts, take them down, raise the middle bar, and hang them by the other end until they will easily unhair. The hides should not be broken until they are taken from the vault, and ready to unhair. In a good vault, where the thermometer ranges from 44° to 56°...
Seite 160 - If we look abroad on the instruments of husbandry, on the implements used in most mechanic trades, on the structure of a multitude of engines and machines ; or if we contemplate at home the necessary parts of our clothing, breeches, shoes, boots, gloves, or the furniture of our houses, the books on our shelves, the harness of our horses, and even the substance of our carriages, what do we see but instances of human industry exerted upon Leather ? What an aptitude has this single material, in a variety...
Seite 198 - ... feet. The covering of earth upon the vault and drain is to preserve a low temperature for the hides, so that they may unhair without tainting. Spring water should be conducted, either in pipes or logs, around the angles formed by the ceiling with the walls of the vault, from which water should be allowed to flow in small quantities, either forming a spray, or falling so as to raise a mist or vapour, and saturate the atmosphere of the vault.
Seite 269 - As you approach the lagoons, the earth seems to pour out boiling -water, as if from volcanoes of various sizes, in a variety of soils, but chiefly of chalk and sand. The heat in the immediate...
Seite 274 - The steam, which has been so ingeniously applied to the concentration and evaporation of the boracic acid, will probably hereafter, instead of wasting itself in the air, be, employed to move huge engines, which will be directed to the infinite variety of production which engages the attention of labouring and intelligent artisans ; and thus, in...