96 



BULLETIN 376, U. S. DEPARTMENT OF AGRICULTURE. 



Table 11. — Comparison of velocities, in feet per second, as computed by various fomvu- 

 las, for given sizes of pipe with given friction heads. 



Diame- 

 ter. 



Friction 

 head, H. 



Velocity per second by formulas. 



Scobey. 



Williams - 

 Hazen. 



Moritz. 



Schoder. 



Swick- 

 ard. 



Noble. 



Inches. 

 6 

 6 

 6 



12 

 12 

 12 



36 

 36 

 36 



72 

 72 

 72 



96 

 96 

 96 



120 

 120 

 120 



144 

 144 

 144 



Feet. 

 2.0 

 5.0 

 9.0 



1.0 

 5.0 

 9.0 



.2 

 1.0 

 5.0 



.2 

 1.0 

 2.0 



.2 

 .6 

 1.0 



.2 



.6 



1.0 



.2 

 ,6 

 1.0 



Feet. 

 1.52 

 2.52 

 3.50 



1.62 

 3.95 

 5.48 



1.35 

 3.30 



8.05 



2.12 



5.18 

 7.60 



2.56 

 4.70 

 6.25 



2.96 

 5.44 

 7.25 



3.32 

 6.10 

 8.15 



Feet. 

 1.48 

 2.45 

 3.39 



1.60 

 3.78 

 5.16 



1.32 

 3.15 

 7.50 



2.06 

 4.89 

 7.14 



2.46 

 4.46 



6.82 



2.84 

 5.14 

 6.73 



3.18 

 5.75 



7.58 



Feet. 

 1. 58 

 2.60 

 3.57 



1.72 

 4.20 

 5.82 



1.52 

 3.71 

 9.06 



2.46 

 6.02 



8.85 



3.02 

 5.55 

 7.37 



3.53 

 6.49 

 8.62 



3.97 

 7.35 

 9.74 



Feet. 

 1.54 

 2.52 

 3.46 



1.67 

 3.98 

 5.50 



1.48 

 3.50 

 8.30 



2.34 

 5.55 

 8.00 



2.86 

 5.15 

 6.70 



3.30 

 6.00 

 7.90 



3.75 

 6.70 

 8.95 



Feet. 

 1.49 

 2.35 

 3.20 



1.65 

 3.85 

 5.10 



1.50 

 3.45 

 7.80 



2.25 

 5.00 

 7.20 



2.55 

 4.45 

 5.60 



2.80 

 4.85 

 6.00 



2.95 

 5.10 

 6.40 



Feet. 

 1.63 

 2.80 

 3.97 



1.63 

 4.19 

 5.90 



1.20 

 3.06 

 7.90 



1.79 

 4.62 

 6.91 



2.13 

 4.04 

 5.44 



2.42 

 4.60 

 6.20 



2.69 

 5.10 

 6.89 



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