22 
BULLETIN 852, IT. S. DEPARTMENT OF AGRICULTURE. 
Table 3. — Elements of experiments for the determination of friction losses in concrete 
pipes, running full; with retardation coefficients for various formulas — Continued. 
1 
2 
S-t 
-2 
3 
4 
5 
6 
© 
ft 
>> 
S 
3 
ft 
Coefficients of retardation. 
® 
9 
10 
11 
12 
13 
14 
u 
M 
© c3 
jj 
© 
T3 
|| 
.§£ 
"cS 
2 
© 
CO 
Name and description of 
fcs 
r^ O 
CO 
Id 
— * 
4 
a 
© 
11 
© 
co 
£2 
pipe. 
DO 
CO 
©8 
CO 
>> 
© 
.a 
o 
© 
o 
© 
M 
CO 
£ 
H 
o 
C 
s 
a 
►3 
GQ 
6 
£H 
a 
M 
£ 
d 
Q 
V 
H 
c, 
C 
Om 
Cm 
n 
/ 
irw. 
cu.ft. 
feet. 
feet. 
9 
S24 
1 
16.0 
Pomona, Calif. : jointed ce- 
1.37 
.98 
.536 
.237 
73.1 
86.8 
.90 
.0154.0^ 
1915 
2 
ment pipe, straight, on 
1.54 
1.10 
.512 
.272 
84.6 
99.8 
1.03 
.0132 
.0362 
3 
continuous down grade : 
pipe clean; laid 18S3. 
1.62 
1.16 
.570 
.272 
84.1 
99.4 
1.02 
.0128 
.0363 
10 
S22 
4 
16.0 
Pomona, Calif . ; jointed ce- 
2.40 
1.72 
1.001 
.304 
94.5 
108.6 
1.11 
.0127 
.0290 
1915 
3 
ment pipe, straight, on 
2.47 
1.77 
1.051 
.305 
94.6 
10S.9 
1.11 
.0127 
.0287 
5 
continuous down grade; 
2.61 
1.87 
1.251 
.296 
91.7 
104.7 
1.07 
.0130 
.0306 
2 
pipe clean; laid 1883. 
2.74 
1.96 
1.315 
.302 
93.8 
106.9 
1.09 
.0128 
.0293 
7 
2.82 
2.02 
1.415 
.300 
93.1 
105.9 
1.08 
.0129 
.0297 
1 
2.92 
2.09 
1.445 
.307 
95.4 
108.2 
1.10 
.0127 
.0283 
6 
3.35 
2.40 
1.964 
.303 
93.8 
105. 4 
1.07 
.0129 
.0292 
8 
3.41 
2.44 
2.088 
.292 
92.4 
103.6 
1.05 
.0129 
.0305 
11 
S25 
1915 
1 
16.0 
Pomona, Calif . ; jointed ce- 
ment pipe, continuous 
grade. 
2.40 
1.72 
.984 
.306 
95.0 
109.7 
1.12 
.0127 
.0285 
12a 
Nl 
16.0 
Z a siphon, Umatilla pro- 
3,74 
2.68 
3.800 
.243 
75.0 
82.4 
.82 
.0154 
.0453 
1912 
ject, U. S. Reclamation 
Service, Oreg. 
4.87 
3.49 
4.500 
.291 
90.0 
98.0 
.98 
.0134 
.0317 
13a 
N2 
1912 
16.0 
Z c siphon, Umatilla pro- 
ject. 
3.42 
2.45 
1. 900 
.314 
98.0 
109.5 
1.11 
.0125 
.0271 
11 
S58 
1 
18.0 
Edwards line, Oakdale 
3.48 
1.97 
1.625 
.254 
79.8 
88.9 
.89 
.0148 
.0405 
1916 
2 
irrigation district, Calif. ; 
straight siphon. 
3.79 
2.15 
1.930 
.254 
79.8 
88.3 
.88 
.0150 
.0405 
15 
S56 
1916 
1 
18.0 
Batdorf line, Oakdale 
irrigation district ; straight 
down grade. 
1.70 
.96 
.309 
.284 
89.7 
106.6 
1.11 
.0132 
.0321 
16 
S42 
6 
19.7 
C lateral, Kamloops, B. C, 
.79 
.37 
.056 
.246 
78.1 
98.3 
1.03 
.0133 
.0429 
1916 
2 
Canada; straight in align- 
ment, wavy in profile. 
1.07 
.50 
.109 
.238 
75.8 
92.7 
.96 
.0145 
.0459 
3 
1.75 
.84 
.272 
.249 
79.2 
93.6 
.95 
.0148 
.0417 
4 
rough joints; laid 1911. 
2.35 
1.12 
.466 
.255 
81.3 
93.7 
.95 
.0147 
.0397 
5 
2.63 
1.25 
.538 
.264 
84.4 
96.8 
.98 
.0143 
.0371 
7 
2.93 
1.39 
.745 
.251 
79.6 
90.6 
.91 
.0151 
.0412 
1 
3.12 
1.48 
.781 
.260 
82.7 
93.9 
.94 
.0144 
.0382 
17 
S46 
4 
19.7 
Bishop lateral, Kamloops, 
B. C, Canada; jointed 
1.33 
.63 
.102 
. 307' 98. 6 
120.0 
1.24 
.0124 
.0271 
1916 
5 
1.98 
.94 
.215 
.315100.0 
119.5 
1.22 
.0121 
.0257 
7 
cement pipe, gentle 
3.14 
1.49 
.557 
.310 98.7 
113.4 
1.14 
.0126 
.0265 
8 
curve in alignment, on 
3.70 
1.76 
.744 
.316! 100. 4 
114.2 
1.15 
.0126 
.0255 
6 
continuous down grade; 
laid 1911. 
4.13 
1.96 
.946 
.3131 99.5 
112.0 
1.12 
.0127 
.0260 
18 
S60 
5 
19.9 
Temescal Water Co., Co- 
2.14 
.99 
.200 
.340108.4 
129.4 
1.33 
.0119 
.0220 
1916 
4 
rona, Calif.; inverted 
3.63 
1.68 
.580 
.339108.1 
123.7 
1.25 
.0118 
.0221 
2 
siphon of jointed cement 
4.07 
1.88 
.700 
.346109.8 
125.3 
1.26 
.0117 
.0212 
3 
pipe reinforced, straight 
5.13 
2.37 
1.094 
.349111.3 
124.3 
1.24 
.0116 
= 0208 
1 
in alignment, double 
5.50 
2.54 
1.278 
. 346 110. 4 
122.5 
1.22 
.0117 
.0212 
reverse curve in profile; 
laid 1911. 
19 
F 
1 
20.0 
Wrought-iron cement-lined 
2.07 
.95 
.230 
.304 
97.4 
115.2 
1.18 
.0124 
.0274 
1880 
2 
pipe, 8,171 feet long ac- 
3.25 
1.49 
.440 
.345 109. S 
127.2 
1.29 
.0115 
.0213 
3 
cording to Schmeer. 
4,20 
1.92 
.730 
.346J 110. 7 
125.1 
1.26 
. 0116 
.0212 
4 
5.08 
2.33 
1.040 
.351112.0 
125.1 
1.25 
.0116 
.0206 
5 
5.67 
2.60 
1.340 
.345110.1 
121.7 
1.21 
.0117 
. 0213 
6 
6.26 
2.87 
1.580 
.351 
111.7 
122.8 
1.22 
.0115 
. 0205 
7 
7.14 
3.27 
1.990 
.356 
113.5 
123.7 
1.23 
.0114 
.0200 
8 
7.50 
3.44 
2.280 
.350 
111.7 
120.9 
1.20 
.0116 
.0207 
9 
8.16 
3.74 
2.720 
.349 
111.1 
119.6 
1.18 
.0117 
.0209 
10 
8.55 
3.92 
3.000 
.348 
110.8 
118.9 
1.17 
.0118 
.0210 
11 
8.73 
4.00 
3.130 
.348 
110.7 
118.5 
1.17 
,0118 
.0210 
12 
8.82 
4.04 
3.200 
.347 
110.6 
118.3 
1.16 
.0118 
. 0210 
20 
S57 
1 
23.7 
Clavey siphon, Oakdale 
4.77 
1.55 
.426 
.328 
106.7 
120.9 
1.21 
.0122 
.0226 
1916 
2 
irrigation district, Calif.; 
5.59 
1.82 
.543 
.340 
110.7 
124.4 
1.24 
.0119 
.0210 
3 
monolithic, on gentle up- 
6.02 
1.95 
.522 
.373 
121.6 
136.7 
1.36 
.0110 
.0174 
grade; built 1912. 
