Hydraulic Tables Coefficients Formulae PDF Download

Excerpt from Hydraulic Tables, Coefficients and Formulæ, for Finding the Discharge of Water From Orifices, Notches, Weirs, Pipes, and Rivers Some remarks will be found at page 224 respecting M. Darcy 's new formula for the velocity of water in iron pipes, as given by Morin in his Hydrauliqus. We have, only since those remarks were written, seen the original Mémoire, printed in Tome XV, Mémoires présentés par divers servants d i'académie dee Sciences de l'instz'tut Impén'al de France, Paris, 1858. This Mémoire extends through 263 quarto pages, of which 34 contain tables calculated from the formula. We have not had time to do more than glance through it, but the deduced formula appears to be entirely de rived from the author's experiments. This we con sider, to some extent, objectionable but, however this may be, there can be no doubt that the value Of the coefficient 0, in the formula v z: c s/fi, increases with the inclination, s, as well as with the diameter, 4r, of the pipe; and as M. Darcy's formula makes the value of the multiplier, c, depend alone on the value of r, or 4 r, there appears an omission, in making the coefiicient of friction entirely independent of the hydraulic inclination, and dependent only on the size of the channel. We shall give a few examples, taken at discretion, to show how limited this formula must be in its application. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.