July 30, 1917 Evaporation from Water and River -Bed Materials 211 



The results of these studies are presented, not as formulas which may 

 be misinterpreted and used where there is no justification for their use, 

 but as curves based upon the original data which clearly show the limits 



Fig. I. — Map showing the general exposure and topography of the section of South Denver, Colo., adjacent to the Irriga- 

 tion Field I,aboratory of the Office of Public Roads and Rural Engineering. 



of application of these data, or as coefficients from these curves. It is 

 the aim to make this investigation of practical value to the hydraulic 

 engineer, in direct contradiction to the statement below, which shows the 



