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Knight's Mechanical Encyclopedia (ed. Knight), L. (search)
the furnaces. The furnaces are placed around the kiln, and blasts of air forced through the fuel and through the top of the fire space. The upper end of the kiln is arched over, and the feed-hole stopped with a removable cover having a perforation in its center. In D the kiln has bottom discharge; the furnaces are arranged on each side and discharge into the kiln. A cross-arrangement of flues counteracts inequality of draft on the windward and leeward sides. A kiln, invented by Mr. Booker of Dublin, having the form of two truncated cones joined at their bases, where the diameter is about 7 feet, tapering to 3 feet at top and bottom, and from 25 to 30 feet in hight, is said to have produced excellent results. A pivoted plate of iron is placed over the top for regulating the draft. Artificial hydraulic lime is now manufactured on a large scale in England and France, and has been employed in a number of important works. Two qualities are prepared by two different proces