ILLUSTRATIONS. 



PLATES. 



Page. 

 Plate I. General view of the Otied Souf region from the town of El Oned, 



showing sand dunes and sunken gardens of date palms. .Frontispiece. 

 II. Fig. 1. — High sand dunes east of El Oued. Fig. 2. — A typical 

 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 -. 30 



III. Fig. 1 . — Near view of sunken palm garden and surroiinding dunes. 



Fig. 2. — Gradiial extension of a palm garden by cutting down bor- 

 dering sand hills. Fig. 3. — Vegetable garden irrigated by well 

 near bottom of basin in which date palms are grown 30 



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 appli- 

 cation in a date garden 30 



V. Fig. 1. — " Dokana," or mound of earth and plaster for strengthen- 

 ing the base of a palm. Fig. 2. — Rhars palm, showing thickness 

 of trunk 30 



TEXT FIGURE. 



Fig. 1. Map showing location of the Oued Souf with respect to other locali 



s i 



8 



ties in Algeria and Tunis 10 



