. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . ¨tres, Q = 0 ⢠62 S ^f2^ = 2 ⢠75 S VH^= 216 d VH ; feet, Q = 0-62SV2^H = 4-974 S VH = 3-9066dVH, d being the diameter of a circular orifice. In the velocity with which water flows from orifices in a thin side, as we have admitted exactlythat due to the head of the reservoir, is it a/2 g- H ? We will examine it. We may ascertain the velocity with which water runs from an oriflce, by the height to which avertical jet, starting from that oriflce, is t
. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . ¨tres, Q = 0 ⢠62 S ^f2^ = 2 ⢠75 S VH^= 216 d VH ; feet, Q = 0-62SV2^H = 4-974 S VH = 3-9066dVH, d being the diameter of a circular orifice. In the velocity with which water flows from orifices in a thin side, as we have admitted exactlythat due to the head of the reservoir, is it a/2 g- H ? We will examine it. We may ascertain the velocity with which water runs from an oriflce, by the height to which avertical jet, starting from that oriflce, is thrown ; it is at least s/l g h, h being that height. Now,from what is known respecting spouting fluids, h difÃ-ers from H only 1, 2, 3, &c., hundredths of thesquare of its value, according as H is 1â¢, 2«, 3, &c. ; and the velocities being as the square rootsof the heights, the actual velocities will differ in the same cases only 1, 2, 3, &c., half-hundredths ofthe theoretic velocity. Another mode of determining the actual velocity indicates still less will present it before making an application of HYDEAULICS. 1897 When a body is thrown in any direction A Y, Fig. 4007, with a certain velocity, by the com-bined influence of that velocity and of gravity, it describes a curve A M B. Oliver Byrne, the compiler and editor of this Dictionary has, 4007. for the first time, in this work, cleared up all the difiÃculties con-nected with this curve A M B ; hence it is unnecessary to dwellupon this matter here. In the present article we confine ourselvesto what concerns the fimdamental principle which we employ;and treat of that parabola which coincides most nearly with thecuive A MB, Fig. 4007. See Damming, p. 1126; and Guîîneky. Let V be the velocity with which a body is impelled alongA Y, and t the time spent in arriving at N, in this dii-ection, ifthe force of projection acted alone upon it ; the motion wouldthen have been uniform, and we should ha
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