96 
BULLETIN 376, U. S. DEPARTMENT OF AGRICULTURE. 
Table 11. — Comparison of velocities, in feet per second, as computed by various formu- 
las, for given sizes of pipe with given friction heads. 
Velocity per second by formulas. 
Diame- 
ter. 
Friction 
head, H. 
Scobey. 
Williams - 
Hazen. 
Moritz. 
Schoder. 
Swick- 
ard. 
Noble. 
Inches. 
6 
6 
6 
Feet. 
2.0 
5.0 
9.0 
Feet. 
1.52 
2.52 
3.50 
Feet. 
1.48 
2.45 
3.39 
Feet. 
1.58 
2.60 
3.57 
Feet. 
1.54 
2.52 
3.46 
Feet. 
1.49 
2.35 
3.20 
Feet. 
1.63 
2.80 
3.97 
12 
12 
12 
1.0 
5.0 
9.0 
1.62 
3.95 
5.48 
1.60 
3.78 
5.16 
1.72 
4.20 
5.82 
1.67 
3.98 
5.50 
1.65 
3.85 
5.10 
1.63 
4.19 
5.90 
36 
36 
36 
.2 
1.0 
5.0 
1.35 
3.30 
8.05 
1.32 
3.15 
7.50 
1.52 
3.71 
9.06 
1.48 
3.50 
8.30 
1.50 
3.45 
7.80 
1.20 
3.06 
7.90 
72 
72 
72 
.2 
1.0 
2.0 
2.12 
5.18 
7.60 
2.06 
4.89 
7.14 
2.46 
6.02 
8.85 
2.34 
5.55 
8.00 
2.25 
5.00 
7.20 
1.79 
4.62 
6.91 
96 
96 
96 
.2 
.6 
1.0 
2.56 
4.70 
6.25 
2.46 
4.46 
5.82 
3.02 
5.55 
7.37 
2.86 
5.15 
6.70 
2.55 
4.45 
5.60 
2.13 
4.04 
5.44 
120 
120 
120 
.2 
.6 
1.0 
2.96 
5.44 
7.25 
2.84 
5.14 
6.73 
3.53 
6.49 
8.62 
3.30 
6.00 
7.90 
2.80 
4.85 
6.00 
2.42 
4.60 
6.20 
144 
144 
144 
.2 
.6 
1.0 
3.32 
6.10 
8.15 
3.18 
5.75 
7.58 
3.97 
7.35 
9.74 
3.75 
6.70 
8.95 
2.95 
5.10 
6.40 
5.10 
6.89 
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