THE ARTESIAN WATER SUPPLY OF EASTERN FLORIDA,

121

the first case, is nine and one third inches-, one-third of the difference between the readings in the table for nine and ten inches, must be added to the f ormer to give the right result. In case one measures the flow of his well 'according to both methods, he may think that they should correspond, but such is not the case. In the vertical discharge, as there is less friction, the flow will be larger, so also differences will be f ound according to the length of horizontal pipe used in the second case. The longer the pipe, the more friction and less the flow.
"As pipes are occasionally at an angle, it is well to know that the second method may be applied to them, if the first measurement is taken strictly vertically, from ;the center of the opening, and the second from that point parallel with the axis of the pipe to
TABLES FOR DETERMINING YIELD OF ARTESIAN WELLS

L. Flow from Vertical Pipes
Discharge in Gallons per Minute
from Respective Pipes of DiamSeter given in Inches. bb
___~ Y2 __3_ _IIn.____ _________ ________

5
6
7
lj
19 20
21
241
29
30
231
248 260 272 284 296 108
120 132
144

3.96 5.60 7.99 9.81 11.33 12.68 13.88
14.96 16.00 17.01 17.93 18.80 19.65
20.46 21.22 21.95 22.6 23.3 7
24.06 24.72 25.37 26.02 26.66 27.28 27.90
28.49 29.05 29.59 30.08 30.55 30. 94 34.1 39.1
43.8 48.2 61.9 55.6 58.9 62.2 65.1 68.0

33.2 8.7
12.5 15.3 17.7 19.8 21.7 2;. 6 25.1 26.6
28.1 29.5 30.7 31.8 33.0
34.2 35.2 36.3 37.5 38.6 39.6
40.6 41.6 42.6 43.5 44.4 45.3 46.1 46.9 47.5 48.2 53.2 61.0,
68.4 75.2 81.0 86.7 92.0 98.0 102.6
106.4

8,91. 12.6 18.0
22.1 25.5 28.5 31.2 33.7 36.0 38.3
40.3 42.3 44.2 45.9 47.6 49.3 50.9 52.5
54.1 55.6 57.0
58.4 59.9 61 .4 62. 8 64.1 65.3
66.4 67.5 68 .5
69.4 76.7 88.0 98.6 108.0 116.8 125.0 132.6 139.9
146.5 153.1

22.4 32.0 39.2
45.3 50.7 55.5 59.8
64.0 68.0 71.6 75.2 78.6 81.8
84.9 87.8 90.7 93.5 96.2 9 8.9 101.6
104.2 106.7 109 .2 111.6
114.0 116.2 118.2 120.3 121.9
123.4 136.3 156.5 175.2 192.9 207.6
222.2 235.9 248.7
260.4 272.2

51.4 71.9 88.3
102.0 113.8
124.9 134.9 144.1 153.1 161.3 169.3 176.9
184.1 190.9 197.5 203.9 210.3 216.5 222.5 228.5
234.3 240.0 245.6 251.1
256.4 261.4 266.1
270.4 274.1 277.6 306.6 352.1 394.3
434.0 467.0
559.5 685.9 612.5

L.Flow from Horizontal Pipes

04-4 Flo, 001
S1 inch
6 in. In. level.

7.01
9.35 10.51 11.68 12.85
14.02 15.19 16.36 17.53 18.70 19.87
21.04 22.21 23.37
24.54 25.71 26.88
28.04 29.11 30.38 31.55 32.72 33.89 35.06 36.23
37.40 38.57
39.64 40.45 41.60

61
7
81 91
12 13
14 15 16 171 18 19 20
21 22 23
24 25 26 27 28 29 30
332
361

w in Gallons per Minute for Iipes-

in Diamn.

4.95 5.77 6.60 7.42 8.25 9.08 9.91 10.73 11.56 12.38 13:21
14.86 15.69 16.51
17.34 18.17 18.99t 19.82
20.64 21.47 22-.29 23.12 23.95 24.77 25.59
26.42 27.25 28. 08
28.64 69.46

2 Inch in Diam. 6 in. 121in. level. Level.

27.71 32.33 36.94
41.56 46.18 50.80
55.42 60.03 64.65 69.27 73 39 78.51 83.12 87.74 92.36 96.98 101.60 106.21 110.83
115.45 120.07
124.69 129.30 133.92 138.54 143.16 147.78 152.39 157.01 161.63 166.25

19.63 22.90 26.18
29.45 32.72 35.99 39.26
42.51 45.81 49.08 52.35 55.62 58.90 62.17 65.44 68.71 71.98 75,26 78.53 81.80 85.07; 88.34 91.62
94.89 98.16 101.43 104.70 107.98 111. 25
114.52 117.79

Continue by adding for each inch1.15 .82 4.62 3.27

I I I I