ON THE CIRCULATION OF UNDERGROUND WATERS. 



161 



1. One mile west of Oakham, Rutlandshire, la. About five years, and deepened 

 several times. 2. About 350 ft. O.D. 3. Shaft 80 ft., diameter 7 ft. 3a. None. 

 4. 40 ft. ; level not perceptibly reduced. 4a. Same height. 5. Not estimated. 

 6. Not observed to vary. Is fed from hills 2 miles each ; 755 ft. O.D. 8. Very 

 sweet and pleasant water ; used solely for brewing. 



Depth in 

 Rocks Feet 



9. Drift 4* 



G 3, upper lias clay .... 30 

 G 2, marlstone rock . . . . 18 

 G 2', „ sands .... 28 



80. 

 Shaft is about to be carried deeper, as a larger supply of water is wanted. 



lO. None seen. 12. Fault 5 miles S.W. ; several faults about 6 miles S.E. This 

 faidt is 6 miles long, running E. and W. 13. None. 14. None. 15. No. 



■ Lias formation. 



Appendix D. — Form of Inquiry now circulated. 



1 . — Position of well or wells with which 

 you are acquainted. 



la. — Date at which the well was sunk. 

 Has it been deepened since 1 



2. — Approximate height .of the same 

 above the mean sea level. 



3. — Depth from surface to bottom of 

 shaft or well, with diameter. 

 Depth from surface to bottom of 

 bore-hole, with diameter. 



3a. — What is the extent and number 

 of the horizontal drift-ways, if 

 any? 



4. — Height at which water stands he- 

 fore and after pumping. Number 

 of hours elapsing before ordinary 

 level is restored after pumping. 



4a. — Height at which the water stood 

 when the well was first sunk, 

 and height at which it stands 

 now. 



5. — Quantity capable of being pumped 

 in gallons per day. 



G. — Does the water level vary at differ- 

 ent seasons of the year, and 

 how ? Has it diminished during 

 the last ten years ? 



7. — Is the ordinary water level ever 



effected by local rains, and if so, 

 in how short a time ? And how 

 does it stand in regard to the 

 level of the water in the neigh- 

 bouring streams, or sea ? 

 8. — Analysis of the water, if any. 

 Does the water possess any 

 marked peculiarity 1 

 9. — Nature of the rock passed through, 

 including cover of drift, with 

 thicknesses. 



10. — Does the cover of drift over the 

 rock contain surface springs 1 



11 If so, are they entirely kept out of 



the well ? 



12. — Are any large faults known to exist 

 close to the well ? 



13. — Were any salt springs or brine wells 

 passed through in making the 

 well? 



14. — Are there any salt springs in the 

 neighbourhood ? 



15. Have any wells or borings been dis- 

 continued in your neighbourhood 

 in consequence of the water 

 being more or less brackish ? If 

 so, if possible, please give section 

 in reply to query No. 9. 



1879. 



M 



