102 



THE DATE PALM. 



116' 



115 



35 10 o 10 zo so 40 



EXPLANATION 



WZm AREA SHOWN IN PLATE III 



LOWLANDS IN COL.RIV.VALLEYi 



32 



116 



115' 



FIG. 10. Sketch map showing the Salton Basin and the easily irrigable lowlands in the Colorado 

 River Valley in Nevada, Arizona, and California. The area inclosed by the dotted line is below sea 

 level. Based chiefly on maps of Lieutenant Ives and of the International Boundary Commission. 



