DETAILED ACCOUNT OF SOME RECENT EXPERIMENTS. 



8l 



date by the Engineer-in-Chief of the East Coast Railway announced 

 that the boring had struck sand at a depth of 390 feet, and that water 

 had risen in the tube to within 16 feet of the ground-level. The same 

 communication contains a section of the boring up to a depth of 

 384 feet, from which the following record is reproduced : — 



Section of Artesian Well-boring at Ellore. 



Number 



of 

 stratum. 



Thickness 



of 

 stratum, , 



Total depth 



from 

 ground-level. 



Description of strata. 





Feet. 



Feet. 





1 



10 



10 



Black cotton soil. 



2 



10 



20 



Black clay hard and stiff. (Water level at 15 ft.) 



3 



10 



30 



Red clay. 



4 



20 



50 



Brown clay. 



S 



10 



60 



Brown clay and sand. 



6 



10 



70 



Nodular limestone and clay. 



7 



10 



So 



Yellow clay. 



8 



10 



90 



Brown clay interspersed with gravel. 



9 



40 



130 



Grey clay and lime nodules. 



10 



20 



150 



Red and yellow clay. 



11 



10 



160 



Grey and yellow clay. 



12 



10 



170 



Grey clay. 



13 



10 



1 So 



Yellow clay with kankar. 



14 



10 



190 



Decomposed yellow sandstone and clay. 



15 



10 



200 



Red and yellow clay. 



16 



10 



210 



Brown and yellow clay with kankar. 



17 

 18 



19 



Yellow and grey clay with kankar. 



Yellow and red clay with kankar. 



Yellow and red clay and decomposed rock. 



( 



) 



