. Engineering and Contracting . imits and detailed effects of thisradius. The Experiments.—The record of the 40 experiments madeis given in Table I. Four of them have been marked doubt- (69) 268 Engineering and Contracting for March 10, 1920. fui on account of actual or supposedly defective observa-tions and al) those made Sept. 9 and 30, also part of those onSept. 25, had to be rejected as worthless on account of thepreviously mentioned violent surging of the water dis-charged by the pump. A separate set of gagings was made Oct. 3 to compare theindications of the Institutes sharp-edged weir w
. Engineering and Contracting . imits and detailed effects of thisradius. The Experiments.—The record of the 40 experiments madeis given in Table I. Four of them have been marked doubt- (69) 268 Engineering and Contracting for March 10, 1920. fui on account of actual or supposedly defective observa-tions and al) those made Sept. 9 and 30, also part of those onSept. 25, had to be rejected as worthless on account of thepreviously mentioned violent surging of the water dis-charged by the pump. A separate set of gagings was made Oct. 3 to compare theindications of the Institutes sharp-edged weir with the In-stitutes 30-in. venturi meter. Owing to the fact that hismeter is set in line of the pump discharge pipe, only 12 from the pump, it had been a question whether at thatshort range it would meter accurately, and the experiments ofOct. 3 were made for the purpose of answering this system for observing head on the weir, available, wasthat known as the Fteley and Stearns im Ihiul. A iiul;:! plate. Flq. Cubic Feet per Second oer Foo-i- In Length of Weir—Diagram Showing Results of the 40 Experiments. was set in the side of the concrete flume, flush with it, andan orifice in this plate in the present instance was ft. upstream from the crest and ft. below it in eleva- RECORD. Pump started about 12:30 p. discharging- 30 cu. ft. per sec. at 1 p. m. All quantities corrected for velocity of approach. Oct: 1. 191S— 2:05 to 2:10 p. m.,2:50 to 2:.=).T p. :50 to 3:55 p. :40 to 4:45 p. m. Weir. Meter. Cu. ft. per sec. both inclusive both inclusive 30 33 both inclusive 18:80 both incUisive tion, connected with a hook-gage pail in the usual manner. Having in mind the imperfections of the whole test appar-atus from the canals in the basement, through the pump,riser. 5-ft. troush, 12-ft. vertical flume, wooden flap val\-e, intothe 10-ft, concrete flume, and over the weir, as already men-tioned, i
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