Ures̓ Dictionary of Arts, Manufactures, and Mines: Containing a Clear Exposition of Their Principles and Practice, Band 2Longman, Green, Longman, and Roberts, 1860 |
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Häufige Begriffe und Wortgruppen
alcohol alkalies alumina ammonia apparatus blast blue boiling bottom called carbonic acid cast iron cent charcoal cinder coal cold colour consists containing cool copper cylinder diameter dissolved distillation Ditto drawing roller employed enamel engraving evaporation feet fermentation fibre filter fire flax frame furnace glass gold grains ground guano gutta percha hackles hammer heat hydrogen inches indigo indigo-blue lever lime liquid liquor machine magnesia manganese manufacture matter means melted metal mineral mixed mixture mould muriatic nitric acid obtained operation oxide oxygen passing piece placed plate portion potash pounds precipitate produced puddling furnace pulley quantity removed rollers salt sand screw shaft side silica silver soda solution specific gravity steam steel stone substances sulphate sulphuric acid surface temperature thick tube tuyères vapour vessel washed weight wheel wire wood yellow zinc
Beliebte Passagen
Seite 129 - Judah : and he hath filled him with the Spirit of God, in wisdom, in understanding, and in knowledge, and in all manner of workmanship. And to devise curious works, to work in gold, and in silver, and in brass ; and in cutting of stones to set them, and in carving of wood to make any manner of cunning work...
Seite 87 - JACOBI, at St Petersburg!), has also made a discovery which promises to be of little less importance to the arts. He has found a method — if we understand our informant rightly — of converting any line, however fine, engraved on copper, into a relief, by galvanic process.
Seite 113 - Straker may be used either by itself or in aid of carving; and depends on the fact, that if a depression be made by a blunt instrument on the surface of wood, such depressed part will again rise to its original level by subsequent immersion in water.
Seite 463 - ... by sudden mechanical compression, the heat, instantly generated, presents a formidable obstacle to the success of the experiment ; whereas, in the compression resulting from their slow generation in close vessels, if the process be conducted with common precautions, there is no source of difficulty or danger ; and it may be easily assisted by artificial cold in cases when gases approach near to that point of compression and temperature at which they become vapours II.
Seite 118 - ... it to such an impalpable state, that it has no longer any sensible effect on the glass ; and, on the other hand, the glass is soft enough to lose during this time sufficient of its substance to allow of accurate comparative results. By this method, the best emery was found capable of wearing away about half of its weight of common French window-glass.
Seite 306 - ... fabrics. Cantoon is a fustian with a fine cord visible upon the one side, and a satiny surface of yarns running at right angles to the cords upon the other side. The satiny side is sometimes smoothed by singeing. The stuff is strong, and has a very fine aspect.
Seite 129 - Sparta with a tablet of brass in his hand, on which was inscribed every part of the habitable world, the seas, and the rivers ; and to this he pointed as he spoke of several countries between the Ionian Sea and Susa.
Seite 418 - I could obtain for surgical purposes, one pound of the substance yielded, on being cleaned, one ounce of impurities. Fortunately it is neither difficult to detect or clean the gutta of foreign matter ; it being only necessary to boil it in water, until well softened, roll out the substance into thin sheets, and then pick out all impurities, which is easily done as the gutta does not adhere to any thing, and all foreign matter is .merely entangled in its fibres, not incorporated in its substance.
Seite 290 - The following calorimeter, founded upon the same principle as that of Count Rumford, but with certain improvements, may be considered as an equally correct instrument for measuring heat with any of the preceding (Lavoisier, Meyers, and others), but one of much more general application, since it can determine the quantity of heat disengaged in combustion, as well as the latent heat of steam and other vapours. ' It consists of a large copper bath capable of holding 100 gallons of water.
Seite 59 - Ductility and Malleability of Metals. Ductility is the property of being drawn out in length without breaking. This property is possessed in a pre-eminent degree by gold and silver, as also by many other metals, by glass in the liquid state, and by many semi-fluid resinous and gummy substances. The spider and the silkworm exhibit the finest natural exercise of ductility, upon the peculiar viscid secretions from which they spin their threads. When a body can be readily extended in all directions under...