236 
Journal of Agricultural Research 
Vol. XXXI, No. 3 
Table III .—Layne & Bowler 7-stage , 12-inch pump, No. 3 y tested January 27 
to February 1, 1915 
Average 
pump 
speed 
Speed 
of pump 
No. 
of 
run 
Pres¬ 
sure 
head 
Suction 
head 
Static 
head 
Ve¬ 
locity 
head 
Total 
head 
Brake 
horse¬ 
power 
Dis¬ 
charge 
Water 
horse¬ 
power 
Effi¬ 
ciency 
R. p. m. 
R.p. m. 
990 
1 
Ft. 
87.00 
Ft. 
0.90 
Ft. 
14.15 
Ft. 
-0.00 
Ft. 
102.05 
4.96 
G.p.m. 
0 
0.00 
Per ct. 
0.0 
990 
2 
90.20 
1.53 
14.15 
-.07 
105.81 
7.53 
85 
2.26 
30.0 
990 
3 
89.49 
1.41 
14.15 
-.09 
104.96 
6.35 
94 
2.49 
39.2 
984 
4 
80.80 
2.06 
14.15 
-.24 
96.77 
7.73 
157 
3.83 
49.5 
986 
5 
73.70 
2.66 
14.15 
-.41 
90.10 
7.71 
205 
4.66 
60.4 
989 
6 
65.50 
3.33 
14.15 
-.63 
82.35 
8.48 
253 
5.25 
61.9 
987 
988 
7 
59.95 
3.73 
14.15 
-.77 
77.06 
8.07 
279 
5.42 
67.2 
985 
8 
53.35 
4.18 
14.15 
-. 93 
70.75 
8.50 
306 
5.46 
64.2 
988 
9 
46.60 
4.63 
14.15 
-1.10 
64.28 
7.95 
334 
5.41 
68.1 
988 
10 
39.50 
5.14 
14.15 
-1.25 
57.54 
7.91 
359 
5.21 
65.9 
988 
11 
33.65 
5.48 
14.15 
-1.42 
51.86 
7.75 
381 
4.98 
64.3 
986 
12 
25. 55 
5.93 
14.15 
-1.60 
44.03 
7.52 
404 
4.48 
59.6 
982 
13 
5.42 
7.06 
14.15 
-2.07 
24.56 
6.96 
461 
2.85 
40.9 
1,028 
1 
98.30 
0.51 
14.15 
-.00 
112.96 
6.76 
0 
0.00 
0,0 
1,030 
2 
101.10 
1.13 
14.16 
-.06 
116.32 
9.40 
81 
2.37 
25.2 
1,032 
3 
93. 60 
1.64 
14.15 
-. 18 
109.21 
10.16 
136 
3.75 
36.8 
1,031 
4 
83.10 
2.49 
14,15 
-43 
99.31 
11.70 
209 
5.23 
44.7 
1,030 
5 
60.65 
4.17 
14,15 
-.97 
78.00 
10.46 
313 
6.16 
58.8 
1,030 
1,029 
6 
45.35 
5.13 
14.15 
-1.34 
63.29 
10.04 
370 
5.91 
58.8 
1,031 
7 
37.30 
5.65 
14.15 
-1. 55 
55. 55 
9.82 
397 
5.56 
56.6 
1,031 
8 
31.41 
5.87 
14.15 
-1.69 
49.74 
10.52 
416 
5.22 
49.5 
1,030 
9 
23. 56 
6.55 
14.15 
-1.86 
42.40 
9.47 
437 
4.67 
49.3 
1,029 
10 
14.92 
7.01 
14.15 
-2.10 
33.98 
9.49 
464 
3.97 
41.8 
1,032 
11 
5.71 
7. 57 
14.15 
-2.35 
25.08 
8.82 
488 
3.08 
34.9 
1,078 
1 
108.17 
0.85 
14.15 
-.00 
123.17 
7.35 
0 
.00 
.0 
1,078 
2 
112.60 
1.24 
14.15 
-.04 
127.95 
8.46 
63 
2.03 
24.0 
1,070 
3 
100.80 
2.20 
14.15 
-.26 
116.89 
11.27 
162 
4.77 
42.3 
1,073 
4 
90.80 
2.77 
14.15 
-.47 
107.25 
12.94 
220 
5.95 
46.0 
1,066 
5 
81.60 
3.50 
14.15 
-. 70 
98.55 
13.16 
267 
6.64 
50.4 
1,068 
6 
70.40 
4.21 
14.15 
-.98 
87.78 
13.36 
315 
6.97 
52.2 
1,073 
1,071 
7 
63.20 
4.77 
14.15 
-l. ie 
80.96 
13.08 
343 
7.00 
53.5 
1,073 
8 
56.10 
5.25 
14.15 
-1.34 
74.16 
13.30 
370 
6.92 
52.0 
1,072 
9 
49.20 
5.71 
14.15 
-1.52 
67.54 
13.13 
395 
6.73 
51.2 
1,073 
10 
42.40 
6.10 
14.15 
-1.69 
60.96 
12.43 
416 
6.40 
51.4 
1,072 
11 
34.85 
6.55 
14.15 
-1.85 
53.70 
10.72 
435 
5.89 
54.9 
1,073 
12 
26.34 
7.06 
14.15 
-2.07 
45.48 
10.26 
461 
5.29 
51.5 
1,076 
13 
13.30 
7.85 
14.15 
-2.40 
32.90 
9.06 
490 
4.06 
44.8 
1,073 
14 
5.76 
8.28 
14.15 
-2.67 
25.52 
8.81 
518 
3.33 
37.8 
1,171 
1 
130.25 
0.56 
14.15 
-.00 
144.96 
7.64 
0 
.00 
.0 
1,168 
2 
131.85 
1.47 
14.15 
-.13 
147.34 
12.10 
114 
4.23 
35.0 
1,170 
3 
123.70 
2.12 
14.15 
-.29 
139.68 
11.89 
174 
6.13 
51.6 
1,170 
4 
115.65 
2.66 
14.15 
-.46 
132.00 
12.43 
218 
7.26 
58.3 
1,164 
5 
106. 65 
3.33 
14.15 
-.67 
123.46 
13.42 
261 
8.13 
60.5 
1,166 
6 
97.05 
3.95 
14.15 
-.90 
114.25 
15.82 
302 
8.70 
54.9 
1,166 
7 
85.15 
4.69 
14.15 
-1.17 
102.82 
15.74 
345 
8.95 
56.8 
1,162 
8 
77.60 
5.20 
14.15 
-1.35 
95.60 
16.16 
372 
8.97 
55.5 
1,164 
9 
70.23 
5.65 
14.15 
-1.50 
88.53 
16.43 
391 
8.73 
53.1 
1,168 
1,169 
10 
64.40 
6.10 
14.15 
-1.69 
82.96 
16.02 
416 
8.70 
54.3 
1,167 
11 
55.70 
6.55 
14.15 
-1.90 
74.50 
15.68 
440 
8. 27 
52.7 
1,165 
12 
48.80 
6.95 
14.15 
-2.08 
67.82 
15.74 
461 
7.89 
50.1 
1,172 
13 
47.50 
6.95 
14.15 
-2.16 
66.44 
16.22 
468 
7.84 
48.3 
1,172 
14 
40.70 
7.40 
14.15 
-2.35 
59.90 
15.66 
490 
7.40 
47.2 
1,172 
15 
35.20 
7.74 
14.15 
-2.49 
54.60 
15.32 
505 
6.95 
45.4 
1,168 
16 
29.94 
8.02 
14.15 
-2.65 
49.46 
15.40 
515 
6.42 
41.7 
1,168 
17 
22.60 
8.48 
14.15 
-2.82 
42.41 
14.79 
533 
5.70 
38.5 
1,171 
18 
16.05 
8.87 
14.15 
-2.97 
36.10 
14.76 
551 
5.02 
33.9 
1,172 
19 
7.23 
9.38 
14.15 
-3.16 
27.60 
14.12 
569 
3.96 
28.0 
