172 A. R. SCHULTZ 
at the same level as the overflow pipe. The basin was saturated, the 
water ponded, and no more water entered the sand, but all escaped 
through the overflow pipe. 
It was believed that the water flowing through the pipe would 
readjust the sand particles and succeed in packing them into smaller 
space than was done on filling the pipe with sand. ‘To accomplish 
this the well tubing at each well was placed in a receptacle on the 
floor of the basement, and the water allowed to flow freely from the 
wells. At short intervals the pipe was revolved in order to assist in 
packing the sand. This process was continued for two days, and as 
the sand settled in the pipe a new supply was added at the intake. 
When the pipe was entirely filled and no further settling took place 
the wells were put back in position shown in Fig. 1, and the water in 
the wells soon stood at the level of the overflow pipe. A constant 
head was maintained at the intake by allowing enough water to flow 
so that a small stream or the surplus water escaped through the 
overflow pipe. 
Tests were now made to ascertain the yield per well at different 
heads. The water at one of the wells was allowed to flow at a given 
head until the flow became constant. The head was then increased 
and maintained until the flow again became constant, and so on until 
each well in turn was tested. 
The test at each well was begun only after the water in all the wells 
stood on a level with the overflow pipe and they were, therefore, 
independent of each other. The flow or yield per well at a given 
head was determined by collecting the discharge per minute, as timed 
by a stop watch, and weighing the water thus collected. The results 
obtained in this test are set forth in the tables appearing on the 
following pages. 
Another series of tests were made similar to those in Table I. 
This time, however, the flows at the various wells were not given time 
to become constant. Each measurement at the five wells was taken 
only after the water in all the wells stood on a level with the overflow 
pipe. After each measurement time was allowed for the water to 
regain its normal condition. The figures therefore in this table 
indicate the flow during the first minute after the well is allowed to 
flow at a certain head. 
