DESCRIPTION OF PLATES. 



Plate I. {Frontispiece.) General view of the Oued Souf region from the town of 

 El Oued, showing sand dunes and sunken gardens of date palms. 



Plate II. Fig. 1. — High sand dunes east of El Oued. The group is standing on 

 a ridge separated hy a ravine from the very liigh dune in the background. 

 Fig. 2. — A ty])ical dwelling house of the Oued Souf, showing its cubical 

 form and roof composed of flattened cupolas. Fig. 3. — General view of the 

 Oued Souf region, showing sunken date gardens and sand dunes. Fence of 

 dead italm leaves along crest of dune in foreground. 



I'L^VTE III. Fig. 1. — Near view of sunken palm garden and surrounding dunes. 

 Vegetable garden in left foreground, showing small size of checks. Near it 

 a young ]ialm. planted in a hole. Fig. 2. — Gradual extension of a iialm garden 

 liy cutting down bordering sand hills. Oldest palms in background, youngest 

 in foreground. Fig. ."]. — Vegetable garden irrigated by well near l)ottom of 

 basin in which date palms are grown. 



Plate IV. Fig. 1. — Hole on slope of dune near bottom of basin in which a young 

 palm is planted. Fig. 2. — Camel manure ready for application in a date 

 garden. 



Plate V. Fig. 1. — " Dokana," or mound of earth and plaster for strengthening 

 the base of a palm. Shows also distance between trees, absence of. other 

 cultures, and play of light and shadow on floor of basin. Fig. 2. — Rhars 

 palm, showing thickness of trunk. 



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