234 
Journal of Agricultural Research 
Vol. XXXI, No. 3 
Table I. — Layne & Bowler 3-stage, 34-inch pump, No. 1, tested October 24 to 
December 4 j 1914 
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. TO. 
jR. p. TO. 
688 
1 
Ft. 
58.05 
Ft. 
0.00 
Ft. 
15.50 
Ft 
-0.00 
Ft. 
73. 55 
7.62 
G p.m. 
0 
0.00 
P.ct . 
0.0 
685 
2 
59.80 
1.62 
15.50 
-.05 
76.87 
10.82 
187 
3.62 
33.5 
686 
3 
53.40- 
4.15 
15.50 
-.24 
72.81 
14.34 
423 
7.76 
54.1 
685 
4 
45.34 
5.52 
15.50 
-. 37 
65.99 
15.21 
532 
8.86 
58.2 
684 
5 
38.20 
6.71 
15. 50 
-.49 
59.92 
15.52 
604 
9.13 
58.8 
686 
685 
6 
32.11 
7.75 
15.50 
-.60 
54.76 
15.78 
672 
9.29 
58.9 
686 
7 
26.53 
8.57 
15.50 
-.69 
49.91 
15.92 
722 
9.09 
57.0 
687 
8 
20.45 
9.48 
15.50 
-.78 
44.65 
16.12 
772 
8.70 
53.9 
686 
9 
13.45 
10.36 
15.50 
-.91 
38.40 
16.24 
825 
8.00 
49.3 
686 
10 
6.12 
11.17 
15.50 
-1.01 
31.78 
16.36 
869 
6.97 
42.5 
772 
1 
75.20 
.39 
15.50 
-.00 
91.09 
9.10 
0 
.00 
.0 
765 
2 
78.70 
2.03 
15.50 
-.04 
96.19 
12.86 
178 
4.32 
33.5 
766 
3 
73.28 
4.48 
15.50 
-.24 
93.02 
17.24 
421 
9.88 
57.2 
759 
4 
68.90 
4.46 
15.50 
-.29 
88.57 
18.16 
468 
10.45 
57.5 
760 
5 
59.95 
6.21 
15.50 
-.44 
81.22 
19.76 
582 
11.93 
60.3 
760 
6 
49.75 
7.91 
15. 50 
-.63 
72.53 
20.72 
690 
12.63 
60.9 
762 
761 
7 
43.80 
8.92 
15.50 
-.72 
67.50 
20.38 
741 
12.62 
61.8 
761 
8 
35.80 
10.00 
15.50 
-.88 
60.42 
21.15 
811 
12.36 
58.3 
760 
9 
28.60 
11.01 
15.50 
-1.01 
54.10 
21.58 
870 
11.88 
55.0 
758 
10 
21.74 
11.78 
15.50 
-1.09 
47.93 
21.69 
908 
10.98 
50.6 
762 
11 
16.71 
12.37 
15.50 
-1.16 
43.42 
21.72 
937 
10.26 
47.2 
760 
12 
11.19 
12.94 
15.50 
-1.25 
38.38 
20.92 
970 
9.39 
44.8 
761 
13 
6.80 
13.47 
15'. 50 
-1.30 
34.47 
21.14 
992 
8.63 
40.8 
837 
1 
92.85 
.37 
15.50 
-.00 
108.72 
8.08 
0 
.00 
.0 
834 
2 
96.80 
2.51 
15.50 
-.09 
114. 72 
17.88 
266 
7.70 
43.0 
828 
3 
88.45 
5.00 
15.50 
-.30 
108.65 
22.81 
480 
13.16 
57.6 
826 
4 
78.90 
6.62 
15.50 
-.46 
100.56 
23.70 
593 
15.02 
63.4 
823 
5 
73.05 
7.56 
15.50 
-.56 
95.55 
24.02 
650 
15.67 
65.2 
822 
6 
62.40 
9.02 
15.50 
-.74 
86.18 
24.69 
745 
16.20 
65.5 
824 
7 
57.20 
9.81 
15.50 
-.82 
81.69 
25.24 
786 
16.20 
64.1 
826 
824 
8 
50.20 
10.79 
15.50 
-.95 
75.54 
25.20 
849 
16.29 
64.6 
824 
9 
42.90 
11.75 
15.50 
-1.07 
69.08 
25.60 
899 
15.67 
61.1 
821 
10 
36.50 
12. 57 
15.50 
-1.18 
63.39 
26.15 
943 
15.08 
57.6 
822 
11 
28.90 
13.41 
15.50 
-1.28 
56.53 
26.27 
983 
14.02 
53.3 
823 
12 
22.40 
14.04 
15.50 
-1.35 
50.59 
26.01 
1,010 
12.89 
49.5 
827 
13 
16.27 
14.86' 
15. 50 
-1.47 
45.16 
26.16 
1,055 
12.02 
45.9 
826 
14 
11.59 
14.88 
15.50 
-1.53 
40.44 
26.73 
1,075 
10.97 
41.0 
828 
15 
7.01 
15.46 
15.50 
-1. 61 
36.36 
26.43 
1,102 
10.11 
38.1 
912 
1 
112.65 
.45 
15.50 
-.00 
128.60 
9.48 
0 
.00 
.0 
903 
2 
115.51 
3.16 
15.50 
-. 14 
134.03 
22.26 
318 
10.75 
48.3 
898 
3 
109.50 
4.64 
15.50 
-.29 
129.35 
26.95 
468 
15.26 
56.6 
896 
4 
101.85 
6.11 
15.50 
-.44 
123.02 
28.50 
577 
17.91 
62.8 
896 
5 
94.90 
7.24 
15.50 
-.56 
117.08 
29.79 
646 
19.08 
64.0 
897 
6 
85.80 
8.49 
15.50 
-.70 
109.19 
30.64 
727 
20.03 
65.3 
895 
7 
80.10 
9.43 
15.50 
-.79 
104.24 
31.14 
775 
20.39 
65.4 
895 
8 
72.00 
10.57 
15.50 
-. 95 
97.12 
32.03 
846 
20.73 
64.7 
896 
9 
66.97 
11.33 
15.50 
-1.06 
92.74 
32.08 
891 
20.85 
64.9 
o»o 
895 
10 
57.80 
12.49 
15.50 
-1.19 
84.60 
32.59 
945 
20.17 
61.8 
893 
11 
50.50 
13.21 
15. 50 
-1.33 
77.88 
33.36 
998 
19.61 
58.7 
896 
12 
45.16 
13.92 
15.50 
-1.40 
73.18 
33.28 
1,028 
18.98 
57.0 
899 
13 
38.53 
14.86 
15.50 
-1.51 
67.38 
33.84 
1,068 
18.16 
53.6 
897 
14 
31.40 
15.53 
15. 50 
-1.61 
60.82 
33.60 
1,106 
16.97 
50.5 
897 
15 
26.34 
16.12 
15. 50 
-1.69 
56.27 
34.32 
1,130 
16.04 
46.7 
898 
16 
18.97 
16.94 
15.50 
-1.79 
49.62 
34.32 
1,165 
14.59 
42.5 
895 
17 
13.34 
17.46 
15.50 
-1.87 
44.43 
33.98 
1,190 
13.34 
39.2 
897 
18 
7.56 
17.90 
15.50 
-1.93 
39.03 
33.73 
1,210 
11.91 
35.3 
' 1,026 
1 
147.50 
.00 
« 17.54 
-.00 
165.04 
18.12 
0 
.00 
.0 
1,026 
2 
148.70 
.73 
17.54 
-. 01 
166.96 
21.58 
94 
3.96 
18.3 
1,020 
3 
151.18 
1.55 
17.54 
-.05 
170.22 
25.51 
192 
8.24 
32.3 
1,025 
4 
152.75 
2.54 
17.54 
11 
172.72 
29.09 
282 
12.29 
42.3 
1,018 
5 
148.20 
3.50 
17.54 
-. 18 
169.06 
32.29 
365 
15.57 
48.2 
1,009 
6 
142.85 
5.14 
17.54 
-.32 
165.21 
36.07 
493 
20.55 
56.9 
1,012 
7 
135.83 
7.04 
17.54 
-. 51 
159.90 
40.28 
624 
25.18 
62.5 
1,009 
8 
125.00 
8.48 
17.54 
-.67 
150.35 
42.04 
710 
26.94 
64.1 
1,011 
9 
119.33 
9.49 
15.50 
-.78 
143.54 
42.97 
766 
27.75 
64.5 
1,009 
10 
115.37 
9.81 
15. 50 
-. 87 
139.81 
45.02 
807 
28.47 
63.2 
1,011 
1,009 
11 
106.68 
11.10 
15.50 
-1.00 
132.28 
45.74 
866 
28.91 
63.2 
1,009 
12 
100.12 
11.92 
15.50 
-1.12 
126.42 
46.67 
921 
29.38 
62.9 
1,012 
13 
91.44 
13.39 
15.50 
-1.29 
119.04 
48.10 
986 
29.62 
61.6 
1,010 
14 
80.80 
14.69 
15.50 
-1.46 
109.53 
48.22 
1,049 
28.99 
60.0 
1,009 
15 
70.30 
15.93 
15. 50 
-1.61 
100.12 
48.62 
1,100 
27.79 
57.1 
1,008 
1,008 
16 
61.93 
16.69 
15.50 
-1.76 
92.36 
48.80 
1,150 
26.80 
54.9 
17 
57.06 
17.37 
15.50 
-1.82 
88.11 
48.98 
1,169 
25.98 
53.0 
1,006 
1,004 
18 
49.16 
18.16 
15.50 
-1.95 
80.87 
48.34 
1,202 
24.54 
50.7 
19 
37.86 
19.24 
15.50 
-2.05 
70.55 
48.22 
1,246 
22.18 
45.9 
1,003 
20 
31.41 
19.78 
15.50 
-2.13 
64.56 
47.46 
1,274 
20.75 
43.7 
1,003 
21 
21.47 
20.51 
15.50 
-2.18 
55.30 
47.39 
1,287 
17.96 
37.9 
999 
22 
8.48 
21.19 
15.50 
-2.31 
42.86 
46.82 
1,321 
14.29 
30.5 
a Static head of mercury column=17.54 feet. Static head of pressure gauge—15.50 feet. 
