38 JOURNAI, OF THE 



pears in the water coming* from the adjacent holes in 

 one direction but does not appear in the water from the 

 holes in the opposite direction. But the average rate 

 of movement has not been determined with a sufficient 

 deg'ree of accuracy to admit of its being- stated. These 

 currents are quite limited in their width; ranging- in the 

 cases tested, from a few feet to, in rare cases, more 

 than 100 yards. And, as mig'ht be expected, the width 

 is not at all constant, but while it gradually increases 

 further down the "stream" as the supply of water be- 

 comes greater, yet this increase of width is by no means 

 constant. The depth at which these underground 

 water currents have been found varies from about 20 

 to nearly 100 feet, and generally they have been found 

 at less than 50 feet below the surface. 



The fact that in the case of some of these wells the 

 water overflows at the surface is due to topographic ra- 

 ther than geologic influences. In some cases, especially 

 at Charlotte, N. C, as mentioned in the table below, 

 the flow from a single well amounts to as much as 10 

 gallons per minute. Here, as in other places where 

 the overflow is slight — even less than one gallon per 

 minute — the amount of water which can be pumped 

 from such a well is considerably larg*er. Thus in the 

 case mentioned at Charlotte (Latta Park) there are 

 several overflowing* wells with an average depth of 42 

 feet. The maximum natural flow from one of these 

 wells is 10 gallons per minute, but with the application 

 of a pump the eight wells yield readily 230,000 gallons 

 per day. Again at Chester, S. C, one well which 

 yields in natural overflow 6 gallons per minute, with 

 the aid of a pump yields nearly 62 gallons per minute 

 or 99,280 gallons per day. In another case, the maxi- 

 mum natural overflow of any one of the eight svells 



