SMITHSONIAN EXPLORATIONS, I929 



181 



Flu. i(j2. — Xcar il> pu.^i^i.L jLi.Kt,.>ii with Salt Rucr, L'aiial I'uurtLcn niLasiircs 

 8 feet deep with a maximum width of 60 feet. 



ill,. i()3. Urca.sLWOod and catclaw offer no obstacle to the giant grading 

 machines employed on the San Carlos project. 



Fig. 164.— Pima houses are usually built of suhuaro cactus ribs, plastered with 

 mud. When their water supply fails, the Pima move. 



