222 EEPORT — 1882. 



6. No. 7. No. 8. No certain information, but good average sandstone water. 

 9. On a hill. No drift, all sandstone 5 ft. Section would be sent if desired. 9a. 

 Towards the bottom. lO. No. 11. No land springs, as well was on a hill. 12. 

 No. 13. No. 14. No. 15. No. 16. The well is not now so much used, as the 

 Cosford works described by Mr. H. J. JIarten supplj- most of the water. 



Farticulars of a Bore-hole sunh tmder Mr. H. J. Marten's superintendence for 

 the Waterworlis belonging to the Corporation of Wolrerhamjyton. 



By Mr. Henry J. Marten, M. Inst. C.E. 



1. The Bore-hole in question is situate at the Cosford Pumping Station 

 of the "Wolverhampton Corporation Waterworks, about nine miles distant 

 from Wolverhampton along the old turnpike road leading from Wolver- 

 hampton to Shrewsbury, and is sunk through the upper soft red, and the 

 conglomerate, into the lower soft red measures of the New Red Sandstone 

 formation. 



la. The boring was commenced in June, 187G, and completed in 

 December, 1877, and it has not been deepened since. 



2. The approximate height of the present surface of the ground above 

 mean sea-level is 200 feet. 



3. The total depth of the bore-hole from the present surface of the 

 ground is 918 feet 9 inches, of which 534 feet is 24 inches in diameter, 

 and the remainder, 384 feet 9 inches, is 15 inches in diameter. 



The bore-hole is fitted at the top with a cast-iron guard pipe which 

 rises about 3 feet above the present surface of the ground, with an opening 

 in it at a depth of 4 feet, and another at between 16 and 17 feet below 

 the present surface of the ground, through which, by means of sluices, 

 the water rising up the bore-hole can be turned either into an adjoining 

 brook or into the engine well. 



3a. There are no horizontal driftways. 



4. When not being drawn upon the water rises in the guard pipe 

 described in reply to question 3, to a height of about 1 foot above the 

 present surface of the ground, or 9 feet above the natural, or original, 

 surface of the ground. At this level, which is denominated the summit 

 level, the artesian force of the deep springs supplying the bore-hole is 

 balanced by the head of water attained in the guard pipe, and everything 

 is at rest. On opening the sluice 5 feet below this point the natural 

 discharge from the bore-hole is at the rate of 480,000 gallons a day. On 

 opening the lower sluice in the guard pipe, so as to reduce the outflow 

 point to the level of the water in the engine well, or 14 feet below summit 

 level, the natural discharge is at the rate of 830,000 gallons a day. On 

 pumping down the water in the bore-hole to a depth of 27 feet below 

 summit level, the yield is at the rate of 1,320,000 gallons a day, and at 

 31 feet below summit level, it is at the rate of 1,420,000 gallons a day. 

 On ceasing to pump and shutting the sluices, the water rises in the bore- 

 hole to summit level in a few minutes. 



4a. Excepting for experimental purposes, the water in the bore-hole 

 has not been permanently pumped down below the engine well level, and 

 when not drawn upon the height at which the water now stands is the 

 same as when the well was first sunk. 



5. The average discharge at engine well level is between 800,000 and 

 900,000 gallons a day, and this quantity is daily pumped from that level. 



6. The level of the water does not appear to vary with the seasons to 



