J I 



MALLET : ADEN AND VICINITY. 



oljtained as many measurements as possible. At Shaik Otliman the 

 section in one well was as follows : — 



No. 1. 



Ft. In. 



Surface soil (sliglitly clayey or silty sand, passing down- 

 ward into sand.) 

 Sand 



Pebbly layer 

 Sand 



Pebbly layer 

 Sand 



Deptb to water 

 of do. 







6 











3 















1 







4 



8 











3 







3 









17' 







Ft. 



In. 







... 17 











... 1 











18 



Water rather brackisb. 



Well No. 2. 

 Surface soil (brown alluvial silt) ... 

 Sand with one or two tbin pebbly layers 

 Pebbly layer 



Deptb to water ... 

 „ of water ... 





2 



6 



... 



12 



3 





1 



3 





16 







16 







1 6 







17 6 



Water same in taste as in No. 1. 



A third well was 17 feet to the surface of water. The slightly lesser 

 depth of No. 2 is evidently due to inequality of the surface, and not to 

 difiPerence in the water line, which in such highly permeable strata of loose 

 sand is no doubt the same in all the wells, except in so far as it may be 

 temporarily altered by drawing. The bottom of No. 1 is of loose sand 

 and of No. 3 apparently of pebbly sand, there being no more impermeable 

 stratum at the bottom of the wells. The wells here become brackish and 

 undrinkable if sunk a few feet deeper, undoubtedly from the infiltration 



{ 272 ) 



