. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . at the entrance of the tube greater than the theoretic velocity, inthe ratio of 100 to 108 ; but to Venturi is principally due our knowledge of the products theycan give. The tubes which he used had a mouth-piece A B 0 D, Fig. 4011, presenting nearly the form ofthe contracted vein ; A B = • 1332 ft., and C D= -1109 ft. ; the body of the tube C DFE variedin length and flare, the flare being measured bythe angle comprised between the sides E C andFD sufficien
. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . at the entrance of the tube greater than the theoretic velocity, inthe ratio of 100 to 108 ; but to Venturi is principally due our knowledge of the products theycan give. The tubes which he used had a mouth-piece A B 0 D, Fig. 4011, presenting nearly the form ofthe contracted vein ; A B = • 1332 ft., and C D= -1109 ft. ; the body of the tube C DFE variedin length and flare, the flare being measured bythe angle comprised between the sides E C andFD sufficiently prolonged. These tubes werefitted to a reservoir kept constantly full of water ;the flowing took place under a constant head of2 - 8873 ft., and the time necessary to fill a vessel of4-8384 cub. ft. was counted as in the experimentsof the same author which we have already men-tioned. DAubuisson gives, in the following Table, the result of the principal observations, after havingremarked that the time corresponding to the theoretic velocity was 25 - 49. Discharge. Coefficient. cubic 0-9870-9760-979 HYDRAULICS. 1905 Ajutage. Time ofRunniug. Coefficient. Observations. Flare. Length. o 3 30 4 384 38 4 38 5 445 44 10 1610 1614 14 feet. •3642 1-0959 1-5093 1-5093 •5775 •1936 •8662 •1476 •1476 275 21 21 19 25 31 28 28 42 0-931-211-211-341-020-820-910-910-61 Jet very irregular. Jet did not fill tlie ajutage. To fill ajutage a projecting body introduced. Exit mouth = that of did not fiD ajutage. »Jet very detached from sides. 4012. Venturi concluded from his experiments, that the tube of the greatest discharge ought to havea length nine times the diameter of the smaller base, and a flare of 5° 6 ; Fig. 4011 represents it ;it would give, adds the author, a discharge 2 • 4 times greater than the orifice in a thin side, and1 • 46 times greater than the theoretic discharge. Moreover, he observes, that the dimens
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