. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. therein, and also through the heating flues / in the oven walls. The gases led in this way intoempty or recently-charged ovens traverse them and pass ofi thence by e into the flue c, which alsoreceives the gases that have passed through the heating flues /. These movements of tlie gasesare produced by the chimney draught, or if convenient by gas-exhausting apparatus in con-nection with the chimney flue ; the movements being regulated mainly by means of the dampers. in 5, connecting the ovens with the chimn
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. therein, and also through the heating flues / in the oven walls. The gases led in this way intoempty or recently-charged ovens traverse them and pass ofi thence by e into the flue c, which alsoreceives the gases that have passed through the heating flues /. These movements of tlie gasesare produced by the chimney draught, or if convenient by gas-exhausting apparatus in con-nection with the chimney flue ; the movements being regulated mainly by means of the dampers. in 5, connecting the ovens with the chimney flues. Operators soon get skilled in working theseovens, and they can then be made to coke very economically. COPPER. Copper, one of the most used of the commercial metals, has been produced from the earliesttimes by processes that are, to a certain extent, wanting in economy. The introduction of electricity,that promised much, has not met with extended practical application in the reduction of copper,metallurgically considered. As far as this agent has been applied in an engineering sense, the usewill be found described under the head of Electricity. The greatest improvement in the obtainingof copper from its ores is due to J. Hollway. When metals are abstracted from their ores by fusion, the necessary heat is generally obtainedby the burning of coal, coke, or other form of carbon. But sulphides are combustible substances,and can be made to burn in air; while oxides are bodies that have been already burnt, or enteredinto combination with ox
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
