Page:Lowell Hydraulic Experiments, 4th edition.djvu/73

 TABLE IV.

Table for Turbines of different diameters, operating on different falls; assuming that the useful effect is seventy-five per cent, of the power expended; also that the velocity of the interior circumference is fifty-six per cent, of the velocity due the fall; and also that the height between the crowns is $1⁄10$ of the outside diameter.