180 



JOHN CLARK AND RONALD EISLER 



.Salt mater.' 



FiQUBE 3.— Effect of pumping water from wells in sands exposed to salt water contamination : A, 

 in an island composed of sand ; B, in a sand island underlain by impervious material ; C, on 

 the coast of a large body of land where the water is confined between impenneable layers. 

 (From Barksdale, Sundstrom & Brunstein, 1936 — Supplementary Report on the Ground- Water 

 Supplies of the Atlantic City Region; fig. 6, p. 31.) 



