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 91
... granular appearance , and seems to have been formed in the manner of mosaic works , of single pieces , but so accurately united , that a powerful magnifying glass was unable to dis- cover any junctures . This circumstance and the ...
... granular appearance , and seems to have been formed in the manner of mosaic works , of single pieces , but so accurately united , that a powerful magnifying glass was unable to dis- cover any junctures . This circumstance and the ...
Seite 101
... granules of potatoe starch vary from the seven - thousandth of an inch to the two - hundredth of an inch . Fig . 20 is a Fig . 20 . 0000 representation of the ordinary appearance of potatoe starch when viewed by the microscope with a ...
... granules of potatoe starch vary from the seven - thousandth of an inch to the two - hundredth of an inch . Fig . 20 is a Fig . 20 . 0000 representation of the ordinary appearance of potatoe starch when viewed by the microscope with a ...
Seite 102
... granules of starch in the seed of the pea are three or four times as large as those in the expressed juice of the stalks ( Liebig ) . Fig . 24 . 0 0 0 0 ♡ o Leeuwenhoeck had observed in 1716 , by means of the microscope , that each granule ...
... granules of starch in the seed of the pea are three or four times as large as those in the expressed juice of the stalks ( Liebig ) . Fig . 24 . 0 0 0 0 ♡ o Leeuwenhoeck had observed in 1716 , by means of the microscope , that each granule ...
Seite 103
... granule are as follows : Instead of being formed simply of a tegument and of a homogeneous interior , the granule is composed of concentric layers of unequal thickness ; but both the interior and the exterior are essentially one and the ...
... granule are as follows : Instead of being formed simply of a tegument and of a homogeneous interior , the granule is composed of concentric layers of unequal thickness ; but both the interior and the exterior are essentially one and the ...
Seite 104
... granules of starch are well rubbed in a mortar with some hard powder , such as sand , the envelope is broken and the interior becomes exposed . If the mixed powder is put into cold water , the starch soon swells up into a tremulent ...
... granules of starch are well rubbed in a mortar with some hard powder , such as sand , the envelope is broken and the interior becomes exposed . If the mixed powder is put into cold water , the starch soon swells up into a tremulent ...
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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...