A Treatise on the Progressive Improvement: And Present State of the Manufacture of Porcelain and GlassLongman, Reese, Orme, Brown, and Green, 1838 - 334 Seiten |
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Seite 32
... placed on shelves , and exposed to a continued current of air until sufficiently dry to be packed in casks for shipment . This clay , which is then in the state of a fine powder , is very smooth , and of an extreme whiteness . Mr ...
... placed on shelves , and exposed to a continued current of air until sufficiently dry to be packed in casks for shipment . This clay , which is then in the state of a fine powder , is very smooth , and of an extreme whiteness . Mr ...
Seite 36
... placed as radii at right angles to the shaft , but so arranged upon it that their flat sides are in the plane of a spiral thread , so that by the revolutions of the shaft , the knives perform the double office of cutting whatever stands ...
... placed as radii at right angles to the shaft , but so arranged upon it that their flat sides are in the plane of a spiral thread , so that by the revolutions of the shaft , the knives perform the double office of cutting whatever stands ...
Seite 37
... placed upon a strong iron grating , and there struck by hammers , until sufficiently reduced in size to fall through the grating to a receiver , whence they are conveyed to the flint mill . In order to expedite the process , and at the ...
... placed upon a strong iron grating , and there struck by hammers , until sufficiently reduced in size to fall through the grating to a receiver , whence they are conveyed to the flint mill . In order to expedite the process , and at the ...
Seite 38
... placed on the top . At the lower part of the shaft , and at right angles to it , are fixed four arms , upon which the grinding stones are fixed ; large blocks of stone of the same kind being likewise placed in the vat . These stones are ...
... placed on the top . At the lower part of the shaft , and at right angles to it , are fixed four arms , upon which the grinding stones are fixed ; large blocks of stone of the same kind being likewise placed in the vat . These stones are ...
Seite 46
... placed at a short dis- tance , and which is ten times the diameter of the pulley ; this wheel when turned by a handle sets the lathe in motion . The clay to be thrown is first cut and weighed and formed into a ball . It is then placed ...
... placed at a short dis- tance , and which is ten times the diameter of the pulley ; this wheel when turned by a handle sets the lathe in motion . The clay to be thrown is first cut and weighed and formed into a ball . It is then placed ...
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Häufige Begriffe und Wortgruppen
acid alkali already annealing antimony appear applied artist baking basaltic borax brought calcined China Chinese clay cobalt colour composed composition compound considerable contain copper crown glass crucible degree of heat described diameter earth earthenware effect employed enamel equal felspar fire flint glass fluid flux furnace fused fusible fusion glaze gold grinding Guinand gypsum imparting inches ingredients kao-lin kiln kind labour lime litharge Loysel manganese manner manufacture mass materials means melted glass ment metallic oxides minium mixed mixture mould nitre occasion operation ornaments oxide oxide of iron oxide of lead painting perfect perfectly pieces placed plate glass polished porcelain portion potash pottery powder preparation produced proportion purpose quantity Ravenhead rendered requisite sand seggars silex silica soda specific gravity specimens substance sufficiently surface temperature thickness transparent tube various varnish vessels vitrified ware weight wherein whole workman
Beliebte Passagen
Seite 127 - 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 126 - 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 conveniencies of life, as would in time constitute a great part of the happiness of the world...
Seite 15 - Dunstable, to seek a remedy for a disorder in his horse's eyes ; when the ostler at the inn, by burning a flint, reduced it to a fine powder, which he blew into them. The potter, observing the beautiful white colour of the flint after calcination, instantly conceived the use to which it might be applied in his art.
Seite 127 - ... of nature, and succour 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 16 - Its excellent workmanship, its solidity, the advantage which it possesses of sustaining the action of fire, its fine glaze impenetrable to acids, the beauty and convenience of its form, and the cheapness of its price, have given rise to a commerce so active and universal, that, in travelling from Paris to...
Seite 17 - Basaltes ; a white and a cane-coloured porcelain biscuit, both smooth and of a wax-like appearance ; and another white porcellaneous biscuit, distinguished as jasper, having in general all the properties of the basaltes, with a very important addition, the capability of receiving through its whole substance, from the admixture of metallic oxides, the same colours as those oxides communicate to glass or enamel in fusion. This peculiar property...
Seite 16 - Parts to Petersburg, from Amsterdam to the furthest part of Sweden, and from Dunkirk to the extremity of the south of France, one is served at every inn upon English ware. Spain, Portugal, and Italy are supplied with it ; and vessels are loaded with it for the East Indies, the West Indies, and the continent of America.
Seite 20 - The coasting vessels, which, after having been employed at the proper season in the Newfoundland fishery, carry these materials coastwise to Liverpool and Hull, to the amount of more than 20,000 tons yearly ; and at times when, without this employment, they would be laid up idle in harbour.
Seite 20 - Though the manufacturing part alone in the Potteries, and their immediate vicinity, gives bread to 15 or 20,000 people, yet this is but a small object when compared with the many others which depend on it...