24 
BULLETIN 852, U. S. DEPARTMENT OE 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 
3 
4 
9 
5 
6 

7 
8 
- 
ft 
Coefficients of retardation. 
9 i 10 
11 
12 
13 
14 
1 
1U 
2 <3 
| 
a 
'd 
'C "3 
1 
s& 
"c3 
.2 
Name and description of 
e 
g-8 
Oo 
w . 
4 
s 
p 
a 
O 
CO 
pipe. 
2S 
3 OT 
1 
02 
>> 

O 
2 c 
1 
a 

I 
J 
Q 
V 
H 
C s 
C 
Cw 
Cm 
n 
f 
ins. 
cu.ft. 
feet. 
feet. 
31 
S4S 
1 42.0 
Victoria aqueduct, siphon' 
9.50 
.99 
.042 
. 466 163. 
188.2 
1.88 
.0084 
.0097 
1916 
5 I 
Xo. 5 (see No. 30 above); 
18.50 
1.92 
.214 
. 402 140. 4 
151.8 
1.48 
. 0105 . 0131 
4 
series not so trustworthy 
20.90 
2.17 
.275 
.400139.9,149.7 
1.45 
. 0106 . 0132 
3 
as Xo. 30; reach much 
21.60 
2.24 
.310 
.389136.21145.1 
1.40 
. 0109 . 0139 
2 
shorter; ignore observa- 
tion 1. 
24.90 
2.59 
.429 
. 382 133. 7 140. 6 
1.35 
. 0112 . 0145 
| 
32 
S35 
3 
46.0 
Ri siphon, Umatilla proj- 
16.20 
1.41 
.096 
.416147.0162.4 
1.59 
. 0099 . 0119 
1915 
2 
ect, TJ. S Reclamation 
25.10 
2.18 
.252 
.397:139.7149.0 
1.44 
. 0108 . 0131 
1 
Service, Oreg.; jointed 
36.50 
3.17 
.544 
. 393 139. 143. 1 
1.36 
. 0109 . 0134 
concrete. 
| 
| 
33a 
N5 
2 
46.0 
Ri siphon, same as Xo. 32 
45.90 
3.98 
780 
.412145.0 
147.9 
1.40 
. 0106 . 0122 
1911 
1 
above; tests made when 
46.20 
4.00 
.870 
.3921138.0 
140.2 
1.33 
.0111.0134 
1912 
3 
pipe was new. 
48.20 
4.17 
1.080 
.375'l30.0 
129.9 
1.23 
.0117.0153 
4 
48.60 
4.21 
1.020 
. 3S1 135. 
135.3 
1.28 
. 0113 . 0142 
33b 
S60 
1 
48.0 
Churn Creek siphon, An- 
derson-Cottonwood irg. 
dist., Calif. 
47.40 
3.77 
1.145 
.313 
111.0 
111.0 
1.04 
. 0137 . 0208 
34 
S52 
1916 
1 
54.0 
Mabton pressure pipe, Sun- 
nyside project, Wash. 
80.80 
4.99 
1.249 
.368 
132.7 
129.4 
1.20 
.0118 0146 
35 
S40 
6 
63.5 
Simms Creek siphon, Sun 
66.40 
3.02 
.289 
. 420 154. 1 
156.7 
1.47 
. 0104 . 0108 
1915 
1 
River project, U. S. Rec- 
78.00 
3.55 
,377 
.432|159.2 
159. 6 
1.49 
.0101.0102 
5 
lamation Service, Mont.; 
86.60 
3.94 
.459 
.4341160.2 
159.2 
1.49 
.0101,0101 
4 
monolithic pipe, straight 
123.30 
5.61 
1.194 
.384 141.0 
135.3 
1.24 
.0114.0129 
2! 
in alignment; built 1907-8 
130. 60 
5.94 
1.286 
.39l!l43.8 
137.7 
1.26 
.0112.0124 
3 
140. 40 
6.39 
1.581 
.3S0133.7 
132.4 
1.21 
. 0116 . 0132 
36a 
AB 
1 
86.6 
Perlmoos cement works, 
58.40 
1.43 
.066 
.344 
130.9 
136.1 
1.28 
. 0123 . 0148 
1913 
2 
Austria; gentle curves in 
90.50 
2.21 
.155 
.345 
132.4 
131.9 
1.23 
.0124'. 0147 
3 
alignment, on continuous 
113.90 
•2.78 
.181 
.402 
153.7 
152.6 
1.42 
.0108!. 0109 
4 
down grade; original data 
131.90 
3.22 
.312 
.355 
136.0 
131.8 
1.21 
. 0122;. 0140 
5 
do not describe pipe 
152. 10 
3.68 
.402 
.358 
137.0 
131.4 
1.21 
.01221.0138 
6 
manufacture or surface". 
166. 70 
4.08 
.496 
.356 
136.3 
129.7 
1.18 
.0122.0139 
37a 
M 1 
110.0 
Catskill aqueduct siphons. . 
542.00 
S.21 
1.150 
.405 
160.0 
142.7 
1.26 
. 0109 . 0101 
38 
S59 
4 
120.0 
Whitney siphon, Los An- 
223.00 
2.84 
.191 
. 326 130. 4 
123.4 
1.12 
. 0133 . 0152 
1916 
3 
geles aqueduct, Calif., 
236. 00 
3.01 
.211 
.328 
131.2 
123.6 
1.12 
. 0132 . 0151 
2 
monolithic pipe, cement 
mortar coat. 
238.00 
3.03 
.284 
.285 
113.5 
106.1 
.96 
. 0153 . 0199 
| 
39a 
M 2 
5 
174.0 
Rondout tunnel, Catskill 
260. 90 
1.58 
.031 
.357 
150.0 
144.8 
1.31 
. 0124 . 0116 
1915 
4 
aqueduct, X. Y.; mono- 
345. 00 
2.09 
.051 
.368 
155.0 
146.4 
1.32 
. 0119 . 0109 
6 
lithic tunnel lining made 
469.00 
2.84 
.112 
.338 
140.5 
130.1 
1.18 
.0131.0130 
3 
with oiled steel forms, ob- 
472. 30 
2.86 
.089 
.381 
159.0 
148.4 
1.32 
.0116' 0102 
2 
servations made on con- 
620. 90 
3.76 
. 155 
.380 
159.0 
144.5 
1.2S 
.0116.0102 
7 
secutive days. 
624. 20 
3.78 
.211 
.327 
137.0 
123.0 
1.08 
. 0134 . 0138 
8 
756. 30 
4.58 
.319 
.323 
135.0 
119.2 
1.04 
. 0136 . 0142 
1 
771. 20 
4.67 
.253 
.369 
154.0 
137.8 
1.21 
. 0119 0108 
40a 
M 3 
6174.0 
Wallkill tunnel, Catskill 
260. 90 
1.58 
.033 
.346 
143.5 
140.1 
1.27 
. 0129 . 0123 
1915 
5 
aqueduct, X. Y., mono- 
345. 00 
2.09 
.051 
.368 
154.0 
146.4 
1.35 
. 0120 . 0109 
7 
lithic tunnel lining made 
469. 00 
2.84 
.107 
.345 
144.0 
133.4 
1.19 
. 0128 . 0124 
4 
with oiled steel forms; ob- 
472. 30 
2.86 
.092 
. 374 157. 
145.7 
1.30 
.0118 .0105 
3 
servations made on same 
620. 90 
3.76 
.192 
.341 
143.0 
128.7 
1.14 
. 0129 . 0127 
8 
day that identical dis- 
624. 20 
3.78 
.170 .365 
152.0 
138.2 
1.22 
.0121.0111 
1 
charge held in pipe Xo. 39 
736. 50 
4.46 
.249 .356 
149.0 
132.7 
1.17 
.0124.0117 
9 
above, which see. 
756. 30 
4.58 
.261 
. 357 149. 
132.9 
1.17 
.0123.0116 
2 
771. 20 
4.67 
.269 
.358149.5133.2 
1.17 
.0123.0115 
41a 
RDJ 
216.0 
Conduit Xo. 2, Ontario 
1,018.00 
4.00 
.108 
.424 181.0163.0 
1.436 
. 0104 1. 0098 
1913 
Power Co., Canada. See 
2, 036. 00 
8.00 
.448 .416 178.01152.0 
1.304 
. 0105'. 0102 
1914 
p. 84 for explanation of 
3.045.00 
12.00 
.990 .420,1S0.0:14S.0 
1.256 
. 0104 . 0100 
items in this table. They 
4, 063. 00 
16.00 
1.701 
.427 
1*3.0 
14S. 
1.242 
. 0102 . 0097 
do not represent data on 
5,091.00 
20.00 
2.397 
.450 
193.0 
153.0 
1.286 
.0097 
.00S7 
actual individual runs, 
but are from velocity- 
friction curve. 
