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Knight's Mechanical Encyclopedia (ed. Knight), K. (search)
. 1. (Printing.) The part of a letter which overhangs the shank. It occurs more frequently in italic than in Roman: jolly old fag embraces the kerned letters of an italic font. 2. (Milling.) A hand-mill for grain. See Quern. Ker′sey. （Fabric.) A probable corruption of Jersey, whence it came. A coarse ribbed cloth made from wool of long staple. Ker-sey-mere′. （Fabric.) A light woolen twilled goods with an oil finish, for men's wear. Named from Kersey, in Yorkshire, England. Cassimere. Ker-sey-nette′. （Fabric.) A thin woolen cloth. Cassinette. Ketch. （Vessel.) An almost obsolete form of two-masted vessel, carrying a tall, square-rigged main-mast forward, and a shorter fore-and-aft rigged mizzen abaft. Being a favorite form of mortar vessel, we frequently read of bomb-ketch in the wars of a past age. Ket′tle. A metallic vessel in which water or other liquid is boiled. In sugar-houses kettles are arranged in rows called b
Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
puteoli, now Pozzuoli, from whence the name pozzaolana, commonly known as Roman cement. This material consists of porous, half-concreted volcanic matter, which is mixed with lime or common mortar to give it the property of hardening under water. It is mentioned by Vitruvins and Pliny. The use of lime in England, as we gather from the accounts of Julius Caesar, was not known previous to the Roman conquest. The oldest limestone quarry in England was opened by the Romans at Tadeaster in Yorkshire, called Calcariae in the Roman itineraries. The quarry is still used. Stamp-mill Lime most commonly occurs in the state of carbonate, such as marble, calcareous spar, oolite, limestone, or chalk. Some limestones include in their composition so large a proportion of iron and clay as to enable them to form cements which have the property of hardening under water, and are called hydraulic limestones. The proportions of clay in vary in different quarries, and often in the same from 8
Knight's Mechanical Encyclopedia (ed. Knight), Q. (search)
in a crucible or cistern, for the purpose of removing it in successive rondles or disks, instead of allowing it to congeal into a solid mass. Rose-copper is thus removed from the crucible of the refining-hearth, the disks being known as rosettes. Quench′ing–tub. （Blacksmithing.) The vessel in which the heated iron or steel from the forge is plunged, in order to cool or temper it. Quern. A hand-mill of the ancient pattern. See grinding-mill A Roman quern dug up in Yorkshire, England, about 1710, was found to be 20 inches in diameter. One stone was somewhat dished, and the other slightly conical. The face had a dress of notches. Quick–match. Cotton-wick is boiled in saltpeter and rain-water for 1 hour, alcohol is added to the mixture while warm, and it is simmered for 15 minutes. Mealed powder is then added, and the whole left for 24 hours. The cotton-wick is wound on a reel, and mealed powder sifted over it. It is then dried. Quick–re-turn′ Gear′
Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
of a wagon covered with its tilt. See A, Plate LXI. It is always set up with a wheel-draft; that is, the current of flame and smoke after passing under the boiler-bottom is made to rise up at the back, whence, returning along one side by a brick flue to the front, it crosses the front end, and thence passes along the other side to the back, where it enters the main flue, which conducts it to the chimney. Wagon-boilers were formerly very generally used in the manufacturing districts of Yorkshire and Lancashire. The usual sizes were 16 to 24 feet long, 6 feet 8 inches deep, and 5 feet wide; each foot in length was considered as capable of supplying steam for 1 horsepower of the engine, a 20 horse-power boiler being 20 feet in length. In one of this size, the fire-grate is 5 feet long and 4 feet wide, the grate bars usually having a fall of 3 or 6 inches from front to back. Dumping-wagon. Wagon-box lifter. Wag′on-bow. An arched-shaped slat with its ends planted in stap