40 VREDENBURG : RECENT ARTESIAN EXPERIMENTS IN INDIA. 



continue the experiment and the work of withdrawing the pipes 

 was commenced. Five different sizes of tubes were used as shown 

 in the following statement :— 





Size of pipe. 



Length 





Inches. 



Feet. 



I. 



9 



3o 



2. 



7* 



1 go 



3- 



6J 



367 



4- 



Si 



470 



5- 



4i 



490 



Unlined boring, 3" diameter. 



The upper end of the J[\" pipe was 30 feet below ground level. 

 As its length was 490 feet, it was sunk to a total depth of 520 feet 

 and was lowered 7' 4" in the rocky strata, leaving an unlined boring 

 of 125 feet. 



While the work of withdrawing the tubes was proceeding, it was 

 noticed that water had risen in the artesian well up to within 36 

 feet of the mouth of the well, and stood some 12 feet higher than 

 the level of the sub-soil water in the neighbouring wells. Unfor- 

 tunately it was not observed at what time this rise took place, 

 whether it was when the pipes were withdrawn to the level of some 

 of the sandy layers in the alluvium, or whether the water had been 

 slowly percolating from the Vindhyans. In order to find out how 

 much water was available, the tubes were again sunk at the cost of 

 considerable difficulty, and the bore-hole cleared out, with the object 

 of enabling pumping experiments to be carried out. The work of 

 lowering the tubes was commenced on the 1st of January 1887, and 

 the bore was finally cleared out on the 16th March. Pumping was 

 commenced on the 18th March, at which date "the water was 35 

 feet 10 inches below the top of the masonry steining. After four 

 ( 40 ) 



