Transactions . 0 1496 1410 573 326 287 200 329 700 316 336 1809 3306 1200 756 329 513 | 50 43 50 34 44 28 45 , - 46 84 164 258 143 149 53 88 95115 27 77 82 100 61 77 73 64 48 45 47 39 57 6 ill .3 50
Transactions . 0 1496 1410 573 326 287 200 329 700 316 336 1809 3306 1200 756 329 513 | 50 43 50 34 44 28 45 , - 46 84 164 258 143 149 53 88 95115 27 77 82 100 61 77 73 64 48 45 47 39 57 6 ill .3 50 for by the deep submergence and by the expansion of the pipe towardthe point of discharge. D, S-in.—An efficiency of 25 to 40 per cent, is very good, consideringthe height to which the water is raised through a 3-in. pipe. The ex-pansion of the pipe from 3 in. through 33^ in., 4 in., to 43^ in., has per-mitted a fair capacity to be obtained. i UNWATERING MINE BY AIU-LIKT. Fig. —^llft, 600 ft.; submergence, 478 ft.) per cent. submergence, ; cu. ft FREE AIR, ; gal. WATER, 75; PER CENT. EFFICIENCY, B—Lift, 75 ft.; subm., 53 ft.; per cent, subm., ; cu. ft. free air, ;gal. water, 119; per cent, eff., 31. C—Lift, 245 ft.; subm., 337 ft.; per cent, subm., ; cu. ft. free air, ;GAL. water, 120; per cent, eff., D—Lift, 600 ft.; subm., 478 ft.; per cent, subm., ; cu. ft. free air, ; GAL. water, 117-160; per cent, eff., ; pressure, 207. E—^Lift, 115 ft.; subm., 205 ft.; per cent, subm., 64; cu. ft. free air, ; gal. WATER, 120; PER CENT. EFF., 37. F—Lift, 129 ft.; subm., 248 ft.; per cent, subm., ; cu. ft. free air, ;GAL. water, ; per cent, eff., G—Lift, ; subm., ; per cent, subm., ; cu. ft. free air, ;GAL. water, 32; per cent, eff., H—^LiFT, 895; subm., 595; per cent, subm., ; cu. ft. free air, ; ,
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
