THE 



IMPROVEMENT OF RIVERS 



A TREATISE ON THE METHODS EMPLOYED FOR 

 IMPROVING STREAMS FOR OPEN NAVI- 

 GATION, AND FOR NAVIGATION 

 BY MEANS OF LOCKS 

 AND DAMS. 



BV 



B. F. THOMAS, 



United States Assistant Engineer, Member of the American Society of Civil Engineers, 



AND 



D. A. WATT, 



United States Assistant Engineer, Member of tbe American Society of Civil Engineers. 



FIRST EDITION. 

 FIRST THOUSAND. 



NEW YORK : 



JOHN WILEY & SONS. 

 LONDON: CHAPMAN & HALL, LIMITED. 



