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Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
f Aulnoye, in Belgium, the slag is cast into slabs for pavements, garden-rollers, and other things. For the former purpose, molds are excavated in the ground around the furnace, and trenches cut to conduct the liquid slag to them The material is allowed to cool very slowly; its interior is then found to be compact and homogeneous, the exterior consisting of a vitreous crust. The masses are often divided by fissures, but may be cut and dressed into smaller blocks. Mr. Woodward, of Darlington, England, has patented a method of manufacturing bricks from slag. The slag from the furnace is run into a series of molds on a revolving table. After removal from the molds, the bricks are annealed in a kiln or furnace, and are ready to be used for any of the purposes to which common brick are applied. The fracture is said to be close and firm, and they are capable of standing an intense heat. They resist a crushing force of 3 to 4 tons to the inch, and it is claimed can be made at le
Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
called bullion weight. 4. Banker's weights for sovereigns. 5. Apothecaries' weight. 6. Diamond weight and pearl weight, including the carat. 7. Avoirdupois weight. 8. Weights for hay and straw. 9. Wool-weights; using as factors 2, 3, 7, 13, and their multiples. 10. Coal-weights, decimal numbers 1, .5, .2, .1, .05, .025. Besides these the gramme, etc., of French metric system, are used by many scientists. There are also ten different stones. A stone of wool at Darlington is 18 pounds. A stone of flax at Downpatrick is 24 pounds. A stone of flax at Belfast is 16 1/4 pounds, and also 24 1/2 pounds. The hundred weight may mean 100, 112, or 120 pounds. A pound weight varies in the avoirdupois and the troy. Weights for small scales are nest, cup, ring, or disk. Weight′ed lathe. One in which the rest is held down firmly on the shears by a suspended weight. Weight′ing. （Founding.) When the flasks in which a mold has been made cannot b<