DETAILED ACCOUNT OF SOME RECENT EXPERIMENTS. 

 Section of the Karani boring — concld. 



55 



Number 



of 

 stratum. 



Thickness 



of 

 stratum. 



Depth 



below 



ground-level. 



Description of strata. 





Feet. 



Feet. 







54 



3775 



408-00 



Black clay; upper part contains fragments 

 decayed wood and broken shells. 



of 



SS 



4 - oo 



4I2'00 



Grey sand mixed with clay. 





56 



4 - oo 



416-00 



Indurated black clay. 





57 



2'00 



418-00 



Grey sand mixed with a little clay. 





58 



TOO 



419-00 



Indurated black clay. 





59 



I '00 



4 20' 00 



Grey sand with clay. 





60 



1 

 2T00 



441 '00 



Grey clay with sand. 





61 



I '00 



442-00 



Limestone. 





Coconada boring. 



The altitude of the ground at the mouth of the well is 71 feet 

 above sea-level. 



A successful experiment has been made lately at Coconada, on 

 the sea-coast in the northern part of the delta of 

 the GodavaVi. 



But here, in all probability, the greatest part of the boring is not 

 through alluvium, but through the " Rajahmundry beds," a local facies 

 of the Cuddalore sandstones. An abundant supply of water was 

 struck at a depth of 295 feet, the water 'overflowing at a height of 

 about one foot and a half above the surface of the ground. The 

 " Rajahmundry beds " consist of alternating layers of sandstone and 

 clay. They outcrop over a considerable area to the north-west of 

 Coconada, and as they dip under the alluvium at a low angle in a 

 south-south-east direction towards the sea-coast, they ought to be 

 very favourably situated with respect to artesian conditions. 



( 55 ) 



