150 



TTHE IRRIGA10N AGE. 



made in ten foot lengths and properly threaded at the ends to admit 

 of extension by use of couplings, will enable the operator, by coupling 

 on more pipe if necessary, to push his investigation to the bottom of 

 the sand strata. A common auger may be used to bore the sand out 

 of the pipe by using an extension to auger stem. The auger should 

 be large enough in diameter to handle coarse gravel and even pebbles. 

 This Trill enable the operator to determine the thickness of water 



FIG. 1. 



Fig. 1 shows an anlarged view of pump cylin- 

 der and pipe as arranged in an open well. 



bearing strata, and besides, to determine the very location of the 

 coarsest sand and gravel, and will also enable him to determine the 

 length and diameter of screen point necessary to use, and the probable 

 water supply that may be obtained from the well when finished. 



If the screen point to be used is four inches or larger in diameter 



