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Knight's Mechanical Encyclopedia (ed. Knight) 3 3 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
sonry.) The top, protecting course on the top of a wall. It is of three kinds:— Parallel coping, level on top. Feather-edged coping, bedded level and sloping on top. Saddle-back coping has a curved or doubly inclined top. The under edge should be throated, that is, grooved, so that the drip will not run back on the wall, but drop from the edge. Cop′per. 1. A red metal. Equivalent, 31.7: symbol, Cu. (cuprum); specific gravity, 8.7 to 8.9, according to density; fusing-point, 1996° F. A moderately hard, malleable, ductile metal. A good conductor of heat and electricity. Its uses are very numerous. In the shape of wire and sheets its employments ramify through all the uses and conveniences of commerce and the household. The alloys, brass and bronze, are the most useful of that interesting class of compounds. Besides these, it enters into the composition of albata, bellmetal, speculum-metal, etc. See alloy. Its salts are usually poisonous, but brilliant, and
Knight's Mechanical Encyclopedia (ed. Knight), D. (search)
ement of the loom, which brought up certain of the colors and depressed others, according to the requirements of the pattern. We read of similar goods in the year 1305 B. C., when Deborah celebrated the victory over Sisera: — Divers colors of needlework on both sides, meet for the necks of them that take the spoil. The events of the bloody battle of Mt. Tabor took place but four days march from Damascus, and it is probable that this ancient city was, as early as the times of Abraham (1996 – 1822 B. C.), the workshop of articles in metal, silk, wool, and flax, as well as the depot of an extensive trade between the Orientals on the east and the Phoenicians, the carriers of antiquity, on the west. Abraham's steward was a man of Damascus, and, in default of issue, would have been heir to his property. Through all the uproar of antiquity Damascus has maintained a prominent position, being geographically well situated and rich in the great necessity of a warm climate, water.
Knight's Mechanical Encyclopedia (ed. Knight), F. (search)
thering. 4, fireplace.8, funnel. 9, flue.12, grate. 10, mantel.13, breast. 11, back.14, damper. The earliest example of a fireplace cited in this work is that of Coninsborough Castle, in England, of the Anglo-Norman period. The mantels are constructed of flat arches. The example is adduced to show the earlier form of chimney, and perhaps the most ancient one in existence, anticipating by several centuries the first chimneys erected in Italy. (See chimney.) The fireplace (A, Fig 1996) in the hall of Vicar's Close, Wells, England, is an example of the fireplace of some centuries back. Fireplaces Louis Savot, of the Faculty of Medicine at Paris (1579-1640), published a work on warming and ventilation in 1624. His is the first recorded attempt at combining the cheerfulness of an open fire with the economy of an inclosed stove. Fig. B shows a front view and an elevation of his ingenious arrangement. The hearth, covings, and back were lined with thick iron plates thr