174 A. R. SCHULTZ 
TABLE I—Continued 
Nope iesasscinet on | FLow IN Grams PER MINUTE 
WELLS WarcH Frow \- GaaEee RN MRIS Si cso = 
Was Trstep 1 Ft. Head 2 Ft. Head 3 Ft. Head 4 Ft. Head 
} fo | 225 | 351 390 420 
TO | 195 332 
| 20 180 | 310 345 | 
| 30 160 | 290 REIS. 370 
40 | 150 270 315 356 
50 | 138 240 289 | 340 
60 | 123 220 268 328 
IDV oo. 6 4 7° EF | IIO 205 252 310 
Mea 80 100 | ate\e) 228 208 
go g2 172 222 290 
imere) gi 120 219 286 
IIO | go 154 220 ; 284 
120 | 89 154 220 284 
130 go 154 220 284 
| Increase in flow’ | 64 g or 71% | 66 g or 73% | 64°g or 71% 
| fo) tiem 166 179 198 215 
| 
| Ae aHire) 155 172 203 
| 20 S22 160 102 
| 3° : 105 I51 180 
| 40 64 96 140 171 
| 50 56 95 128 nes 
60 50 83 120 156 
7° 48 83 II5 152 
80 “48.2 83 115 150 
oe aS 83 150.2 
Too 48.2 115 150.4 
rLO 48.2 
120 83 115 6 
| 130 48 83 115 é 150 
Increase in flow 35 g or 73% | 32 g or 67% | 35 g or 73% 
| 
On examining the above two tables it is evident that the flow at 
each of the wells for a given head is about the same. Well Data given 
head furnished as much water as well A, B, or C, although its distance 
from the outcrop is much greater. Well Eis the only exception. The 
decrease in yield here is due, no doubt, to the nearness of the well to 
the end of the pipe which greatly reduces the area supplying the well. 
The flow or yield per well does not increase at the same rate as the 
pressure but lags somewhat behind. As determined from the various 
measurements recorded in Tables I and IJ, the flow or yield per well 
approximates 73 per cent. of the increase in pressure or head. In 
other words, doubling the head increases the flow by about 73 per cent. 
In a test made by Professor Turneaure for the Madison waterworks 
