CANNON 



I'ig. 18. Shoot-habit of Haloxylon auticulatum, tiom the plain near the Oaya of Tilrempt. 



1 i^. IV. A.t;iuultLrc at Gheirdaia. 1 he lields arc divided into plots about 3 by 4 feet in size, 

 for the more economiceJ use of water. Young barley is shown growing (Novembrr). 



