ON THE CIRCULATION OF UNDEKGEOUND WATEES. 



227 



lO. Yes. H. Entirely out. 12. One great fault three miles to the W. is known, 

 and another large one suspected four miles to the E. These faults run from N. W. to 

 S.E. 13. No. 14. No. 15. No. 16. Several chalybeate sjarings formerly existed 

 (shallow wells penetrating into the drift), they arc all now disused but one. 



Collected by Mr. E. Wethered, C.E. 



From Mr. J. N. Taunton, C.E., F.G.S., Engineer to the Thames and 

 Severn Canal. 



1. Thames Head, three miles south-west of Cirencester. la. About 1793. 

 2. 364 feet. 3. 63 feet depth of well ; shape oval 15 ft. x 10 ft. No bore-hole below- 

 bottom of well. 3a. Original di'ift-way 30 yds. subsequently extended down the 

 valley some 500 j-ards tailing into cutting about 17 feet in depth. 4. and 4a. The 



k water-level varies from 30 to 53 feet below the surface, according to the seasou and 

 pumping. When the engine pumps continuously it usually lowers the water-level 



