690 



THE NATIONAL GEOGRAPHIC MAGAZINE 



END OF THE PROTECTIVE LEVEE AT THE INTAKE OF THE IMPERIAL CANAL SYSTEM 

 BELOW YUMA. CUT THROUGH AND DESTROYED BY THE COLO- 

 RADO RIVER IN DECEMBER, IOX>6 



THE GORGE CUT BY THE NEW RIVER AT CALEXICO IN THE SUMMER OF I906 

 FERRY-BOAT OPERATED BY INDIANS 



