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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
ged that the salient portion of each cam advances to give color to its appropriate prism, while the others pass by uncolored. 10, 11, 12, are ordinary printing-rolls, which may be auxiliary to the prismatic colorers. A is the main cylinder which carries the end apron on which the cloth passes from the pay-off roller, past the printing, and thence to the dryer or ageing-loft. Cal′i-duct. A pipe for conveying hot water or steam for heating purposes. A term given by Cardinal Polignac, 1713, to the pipes, etc., in which air was heated by the adjacent fire, and from which the air passed into the room. They were used by the ancient Romans (see hypocaust), and in the Arab palaces of Cordova, in Spain, about A. D. 1000, being imbedded in the walls, and carrying the heat of the hypocaust to the apartments in winter. Ca′lin. An alloy of lead and tin, used by the Chinese as a lining for tea canisters and boxes. Calipers. Cal′i-pers. An instrument, jointed like a pair<
Knight's Mechanical Encyclopedia (ed. Knight), I. (search)
uantities and of excellent quality. The forests of these countries gave them a natural advantage over England, whose woods had by this time become thinned out, so that the use of wood for iron smelting had been forbidden by act of Parliament in 1581, within twenty-two miles of the metropolis, or fourteen miles of the Thames, and eventually was forbidden altogether. The art of making iron with pit-coal, and of casting articles of iron, was revived by Abraham Darby, of Colebrook dale, about 1713, and was perseveringly followed, although it was but little noised abroad. In the Philosophical Transactions for 1747 it is referred to as a curiosity. Certain parties had attempted to smelt iron in clay pots exposed in a furnace, resembling that used for glass, to the flame of a pit-coal fire, expecting to procure the iron by tapping the pots. The scheme, which might have answered with a more tractable material, failed in the case of the iron ore. Tinning of iron was introduced from
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
-aft sails, denominated spencers or trysails, but these are small and are brailed up to the gaff when furled, instead of being lowered like those of a schooner. The first constructed was built by Captain Andrew Robinson in Gloucester, Mass., in 1713, and was so named from her scooning or sailing over the water as she was launched. A Ballahore schooner has a foremast raking forward. Schwan-pan. The Chinese abacus. It is very extensively employed by that people in their everyday businarliament in 1581 within 22 miles of the metropolis, or 14 miles of the Thames, and eventually was prohibited altogether. The art of making iron with pit-coal and of casting articles of iron was revived by Abraham Darby, of Colebrookdale, about 1713, and was perseveringly followed, although it was but little noised abroad. In the Philosophical Transactions for 1747 it is referred to as a curiosity. See casting, p. 449. The extension of the iron manufacture dates from the introduction of