THE FLOW OF WATEE IN WOOD-STAVE PIPE. 27 



Column 2 gives a consecutive reference number to each observation. 



Column 3 shows the authority (see also column 3, Table 3), the series number where 

 3uch was carried, together with the date of the test. 



HS refers to Hamilton Smith. 



EM refers to E. A. Moritz, engineer of the United States Reclamation Service. 



C refers to J. L. Campbell. 



A refers to the late A. L. Adams. 



DB refers to Darcy and Bazin. 



H refers to D. C. Henny. 



JDS refers to the late J. D. Schuyler. 



JM refers to J. S. Moore, assistant engineer, United States Reclamation Service. 



N refers to T. A. Noble. 



M\\^H refers to Professors Marx, Wing, and Hoskins, of Leland Stanford, Junior, 

 University. 



EC refers to E. C. Clarke. 



S refers to the writer, Fred. C. Scobey, irrigation engineer, in charge of experiments 

 on the flow of water in channels and pipes. 



Column 4 gives the observation number as carried by the experimenter. 



Column 10 shows the value of n as computed from the observation. 



Column 11 shows the value of n for a normal pipe of the same size at the observed 

 velocity. This value is taken by inspection of the n curves in Plate VIII. The 

 writer has termed this the normal value of n. 



Columns 14 to 18, inclusive, show the velocities for the same size of pipe with the 

 given loss of head (column 9) when computed by the various formulas. 



Columns 19 to 23, inclusive, show the percentage comparison of observed velocities 

 (column 8) to computed velocities (columns 14 to 18). This comparison is explained 

 on page 55, in connection with the information in Plate VII. The grand algebraic 

 means of all observations in the respective columns are given at the foot of the columns 

 on page 37. These means are graphed in Plate VII and shown also on page 14. The . 

 other columns are self-explanatory. 



EXPLANATORY NOTES ON TABLE 3. 



Column 1 gives the same consecutive numbers of pipes as column 1, Table 2. See 

 discussion after "Column 1 " on page 26. 



Column 2 gives the inclusive reference numbers of observations on that particular 

 pipe, which are the same as those in column 2, Table 2. 



Columns 10 to 14, inclusive, give the weights assigned to the determination of the 

 general value of the exponent of V in formula 12, page 7. The method of finding 

 these weights is explained on page 52. 



Column 15 gives the weights assigned the various series in determining the general 

 equation for the intercept curve shown in figure 4. 



Column 16 gives the revised values of the intercepts for individual pipes as explained 

 on page 53. Note that these may be quite different from the value representing the 

 intercept in the equations shown in column 17. 



Column 17 gives the formulas of flow, as shown by the observations, for the individual 

 pipes. Their derivation is explained on page 53. 



Columns 18 to 22, inclusive, have the same general significance as columns 19 to 23, 

 Table 2, respectively. For the series the figures given are the algebraic means of the 

 percentages for the observations. The grand algebraic means for all pipes are shown 

 at the foot of the columns on page 39. These means are graphed in Plate VII, and 

 are also given on page 14. 



The other columns are considered self-explanatory. 



