112 



HYDRAULIC INVESTIGATIONS, 



add a second table of the coefficients, for assisting the cal- 



75 

 culation. In this case, a becomes -0000001 (413 4- "J*-— 



1440 180 \ / QOOdd 1 



dV^i-dV'sToh c - ,0000001 {ddTTm * Vd 



13*21 1*0563\ 1 



(1085 + — d ~ + ~dd~)\ and h -^TT-^oTtT' * bemg 



#c/ /V/$ rex c 



-^~, and ». = y \hh + e % ) — <?, or = V ^7 + jj — 7, 



as before; and in either case the superficial velocity of aVi- 

 ver maybe found, very nearly, by adding to the mean velo- 

 city v its square root, and the velocity at the bottom by 

 subtracting it. 



Table of Coefficients, for English Inches. 



II. Of the Resistance occasioned by Flexure in Pipes or E 



vers. 



Mr. Dubuat has made some experiments on the effect 

 perimentsou tn ^ flexure °» a V^P e in retarding the motion of the watt 



effect oiflcxure flowing through it; but they do not appear to be by ai 

 in a pipe. ■ " Xl 



meai 



