 | Thomas Tredgold - Hydraulic engineering - 1836 - 288 pages
...mean proportional between these two lines. Taking two English miles for a given length, we must find a mean proportional between the hydraulic mean depth and the fall in two miles, and inquire what relation this bears to the velocity in a particular case, and thence we may... | |
 | Technology - 1848 - 652 pages
...and this is the accurate formula, from which the approximate common rule (of taking -j-^thi of the mean proportional between the hydraulic mean depth and the fall in two miles) is derived. The law connects the inclination with the velocity ; and if the latter term be not... | |
 | Great Britain. Metropolitan Sanitary Commission - London (England) - 1852 - 460 pages
...second of any river or wafer-course flowing through a straight and uniform channel is equal to \\ths of a mean proportional between the hydraulic mean...which the foregoing rule is deduced is as follows : 10 11 in which d is the hydraulic mean depth as before, andy the fall in two milts. Sir John Leslie's... | |
 | Royal Society of Victoria (Melbourne, Vic.) - 1855 - 348 pages
...twelve inches per mile, the mean velocity per second will be, by Eytewein's formula, ten-elevenths of a mean proportional, between the hydraulic mean depth and the fall in two miles, the hydraulic mean depth being found by dividing the sectional area, 127 square feet, by -the... | |
 | William John Macquorn Rankine - Engineering - 1866 - 342 pages
...•007565; then the first approximation to the velocity is v• = 8-0SB.^L- =J 8511 im = 92-26 Ji ,«; or, a mean proportional between the hydraulic mean depth and the fall in 8,512 feet. A first approximation to the discharge is Q• = v• A. • These first approximations... | |
 | John Neville - Hydraulics - 1875 - 582 pages
...velocities. SIR JOHN LESLIE states,* that the mean velocity of a river in miles per hour, is -r£ths of the mean proportional between the hydraulic mean depth and the fall in two miles in feet. This rule is equivalent, for measures in feet, to (107.) v = 100 VTT;and is applicable... | |
 | John Neville - Hydraulics - 1875 - 572 pages
...velocities. SIR JOHN LESLIE states,* that the mean velocity of a river in miles per hour, is -fj~t,hs of the mean proportional between the hydraulic mean depth and the fall in two miles in feet. This rule is equivalent, for measures in feet, to (107.) v = 100 *J~r7; and is applicable... | |
 | John Neville (civil engineer.) - 1875 - 566 pages
...velocities. SIR JOHX LESLIE states,* that the mean velocity of a river in miles per hour, is -firths of the mean proportional between the hydraulic mean depth and the fall in two miles in feet. This rule is equivalent, for measures in feet, to (107.) v = 100 VTT) and is applicable... | |
 | Charles Slagg - Sanitary engineering - 1876 - 292 pages
...of similar form to those we are now considering is about nine-tenths (more accurately ten-elevenths) of a mean proportional between the hydraulic mean depth and the fall in two English miles, supposing the channel to be prolonged so far. The mean velocity per second of any such stream may therefore... | |
 | William John Macquorn Rankine - 1883 - 454 pages
...such as/' = -007565; then. the first approximation to the velocity is = V 8512 im = 92-26 ,/i ,»; or, a mean proportional between the hydraulic mean depth and the fall in 8,512 feet. A first approximation to the discharge is Q' = v' A. These first approximations are in... | |
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LESLIE states,* that the mean velocity of a river in miles per hour, is -r£ths of the mean proportional between the hydraulic mean depth and the fall in two miles in feet. This rule is equivalent, for measures in feet, to (107.) v = 100 VTT;and is applicable... 