Key points are not available for this paper at this time.
A formula, C = − 42 log 10 (C/R + ϵ /R), is developed for the resistance to flow in open channels, which it is believed is an improvement over Manning's or other formulas hitherto proposed. Graphs are given for the solution of this equation with three different groups of given quantities.
Ralph W. Powell (Tue,) studied this question.