. The Street railway journal . lbs., or per ton lbs. This is on an oldworn-out rail. Between Chicago Anenueand Madison Street, on Clark Street, onnew steel rails, 53 tests with an average passengers, gave 29* lbs. as the forcerequired to keep the car in motion. This is an average of lbs. per ton. Thecar made 17 starts on this track passengers. Average force exerted tostart, lbs; average per ton, the first mentioned track 30 tests withan average of passengers gave an aver-age force of 487 lbs.; average per ton, These tests indicat
. The Street railway journal . lbs., or per ton lbs. This is on an oldworn-out rail. Between Chicago Anenueand Madison Street, on Clark Street, onnew steel rails, 53 tests with an average passengers, gave 29* lbs. as the forcerequired to keep the car in motion. This is an average of lbs. per ton. Thecar made 17 starts on this track passengers. Average force exerted tostart, lbs; average per ton, the first mentioned track 30 tests withan average of passengers gave an aver-age force of 487 lbs.; average per ton, These tests indicate that on the steel railabout times the foice necessary to keepthe car in motion must be exerted to startit. On the iron rail times the forcemust be exerted to start the car than is re-quired to keep it in motion. These tests show the enormous loss ofpower required in making frequent FIG. 5. According to English engineers, a trac-tive force equal to 100 lbs., continuouslyexerted will draw on a level rood as fol-lows: common gravel, 15 cwt.; macadam,2,700 lbs.; granite pavement. 3,500 lbs.;broken stone surface, 3,400 lbs., laid on anold flint road; same on rough stone pave-ment, 4,800 lbs.; wood pavement, 5,475lbs.; stone pavement (good), 6,700 lbs.; ironrailway track, 27,600 lbs. Whitney. The St. Paul Street Railway. We have to thank Mr. H. M Littell, Su-perintendent for a copy of the annual show-ing for 1884, of this enterprising road. Dur-ing the past year, the old cars have beencondemned to destruction; old iron railsand vexatious delays at switches, sup-planted by double steel tracks. New routeshave been established and old ones aban-doned for more convenient streets; 45,975feet of new track were laid. Three newsnow plows have been bought and one isbuilding. The fare conveyor will beused throughout. New barns and officeshave been erected, 244 feet on Forbes St
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
