WATEE SUPPLY, PLUMBING, ETC., FOR COUNTRY HOMES. 23 
To find the approximate discharge at each stroke of a pump in 
gallons use the following table: 
Table of capacity of pumps. 
Length of stroke in inches. 
Diameter 
of cyl- 
inder in 
5 
6 
7 
8 
9 
10 
12 
14 
15 
16 
Capacity per stroke in gallons. 
1 
0.01? 
0.020 
0.024 
0.027 
0.031 
0.034 
0.041 
0.048 
0. 051 
0.054 
n 
.022 
.026 
.030 
.034 
.039 
.043 
.052 
.060 
.065 
.069 
u 
.027 
.032 
.037 
.043 
.048 
.053 
.064 
.074 
.079 
.085 
if 
.032 
.039 
.044 
.051 
.058 
.064 
. 077 
.089 
.096 
.103 
i| 
.038 
.046 
.054 
.061 
.069 
.077 
.092 
.107 
.115 
.122 
11 
.052 
.063 
.073 
.083 
.094 
.104 
.125 
.146 
.156 
.170 
2 
.068 
.082 
.095 
.109 
.122 
.136 
.163 
.190 
.204 
.218 
2i 
.086 
.103 
.121 
.138 
.155 
.172 
.206 
.241 
.258 
.275 
2i 
.106 
.128 
.149 
.170 
.191 
.213 
.255 
.298 
.319 
.340 
2| 
.129 
.154 
,180 
.206 
.231 
.257 
.309 
.360 
.386 
.411 
3 
.153 
.184 
.214 
.245 
.275 
.306 
.367 
.428 
.459 
.489 
3i 
.179 
.215 
.251 
.287 
.323 
.359 
.431 
.503 
.539 
.575 
31 
.208 
.249 
.292 
.333 
.375 
.417 
.499 
.583 
.625 
.666 
3| 
.239 
.287 
.335 
.382 
.430 
.478 
.574 
.669 
.717 
.765 
*■ 4 
.272 
.326 
.381 
.435 
.490 
.544 
.653 
.762 
.816 
.870 
4i 
.307 
.368 
.429 
.491 
.553 
.614 
.737 
.860 
.921 
.982 
4J 
.344 
.413 
.482 
.551 
.619 
.689 
.826 
.964 
1.033 
1.102 
4| 
.384 
.460 
.537 
.614 
.690 
.767 
.920 
1.073 
1.150 
1.227 
5 
.425 
.510. 
.595 
.680 
.765 
.850 
1.020 
1.190 
1.275 
1.360 
51 
.469 
.562 
.656 
.750 
.843 
.937 
1.124 
1.311 
1.405 
1.499 
51 
.514 
.617 
.720 
.823 
.926 
1.029 
1.234 
1.440 
1.543 
1.646 
5| 
.562 
.674 
.787 
.899 
1.011 
1.124 
1.348 
1.573 
1.686 
1.798 
6 
.612 
.734 
.857 
.979 
1.102 
1.224 
1.469 
1.714 
1.836 
1.958 
The discharge per stroke as shown by the above table may be 
multiplied by the number of strokes per minute to find the discharge 
in gallons per minute. 
The power required for pumping will depend on the number of 
gallons per minute one wishes to pump and the total lift. 
The total lift is the vertical distance from the surface of the water 
in the well to the highest faucet or to the storage tank plus the 
friction loss in the pipes. If the length of distribution pipe is over 
100 feet the loss by frictional resistance in feet of lift should be 
determined and included in the total lift. The following table gives 
the frictional loss in feet of lift per 100 feet in pipes from f to 4 inches 
in diameter, discharging from 5 to 40 gallons per minute. 
Fractional loss in feet for 100 feet clean iron pipes. 1 
Gallons 
per 
minute. 
finch. 
1 inch. 
inches. 
1* 
inches. 
2 
inches. 
2| 
inches. 
3 
inches. 
3J 
inches. 
4 
inches. 
5 
10 
15 
7.6 
29.9 
66.0 
1.9 
7.3 
16.1 
0.71 
1.4 
•5.5 
0.27 
1.0 
2.2 
0.09 
.28 
.57 
0.05 
.09 
.18 
0.01 
.05 
.09 
0.01 
.05 
0.02 
20 
115.0 
28.0 
9.5 
4.8 
.96 
.32 
.13 
.07 
.03 
25 
179.0 
43.7 
14.7 
6.0 
1.7 
.48 
.23 
.09 
.05 
30 
264.0 
63.2 
21.0 
8.6 
2.1 
.69 
.30 
.14 
.07 
* 35 
372.0 
85.1 
28.9 
11.6 
2.7 
.92 
.39 
.20 
.11 
40 
461.0 
110.0 
37.0 
14.9 
3.7 
1.2 
.53 
.25 
.14 
Ellis and Howland's experiments. 
