THE CONSERVATION OF ~53 

 GROUND WATER 



A SURVEY OF 



THE PRESENT GROUND-WATER SITUATION 



IN THE UNITED STATES 



BY 



HAROLD E. THOMAS 



U.S. Geological Survey 



Sponsored by 

 The Conservation Foundation 



First Edition 



McGRAW-HILL BOOK COMPANY, INC, 



NEW YORK TORONTO LONDON 

 1951 



