. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. 120 lb. of coke to the ton of metal melted, whichconsisted of various mixtures of Clevelandhematite and Scotch pig. The diameter was3 ft. 6 in. ; height from tapping hole to chargingfloor, 14 ft. It was supplied with blast from ablower, at a pressure of 25 lb. to the sq. in.,and melted at the rate of about 5J tons anhour. The construction of Krigars cupola is shownat p. 2365 of this Dictionary. It has not comemuch into use in England, and recent Germanexamples are considerably modified, being cir-cular in
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. 120 lb. of coke to the ton of metal melted, whichconsisted of various mixtures of Clevelandhematite and Scotch pig. The diameter was3 ft. 6 in. ; height from tapping hole to chargingfloor, 14 ft. It was supplied with blast from ablower, at a pressure of 25 lb. to the sq. in.,and melted at the rate of about 5J tons anhour. The construction of Krigars cupola is shownat p. 2365 of this Dictionary. It has not comemuch into use in England, and recent Germanexamples are considerably modified, being cir-cular in section, and having a chamber arrangedwhere the breast is placed, this chamber beingat a lower level, and practically acting as a col-lecting ladle, the metal being run from itthrough a taphole in the ordinary way. The Mackenzie cupola. Figs. 1250, 1251, islargely used in the United States. It is gene-rally elliptical in plan, Fig. 1251, and the blast,instead of being supplied through tuyeres, isadmitted through an opening which extendscompletely round the bottom part of the
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
