ON THE CIRCULATION OF UNDERGROUND WATERS. 



373 



Collected by Mr. Thomas S. Stooke from Messrs. Timmins and Son, 



Bdmcorn. 



1. Shrewsbury Grammar School, on the banks of the Severn, la. Sunk in 1881 ; 

 bored in 1882. 2. 245-89 feet above Ordnance datiim. 3. Well 114 feet deep, 

 4 feet 6 inches lined with cast-iron cylinders. Borehole, 171 feet deep from surface, 

 3 inches diameter. 3a. 80 feet. Two in number, 10 feet x 10 feet x 3 feet wide. 

 ft. Water stands at 74 feet below surface, and is not affected by the quantity of 

 rainfall. 4a. 74 feet 5 inches below surface. 5. Yield, 7,100 gallons per hour; the 

 quantity pumped does not approach this at all. Cannot say what quantity is pumped. 

 6. Cannot say. 7. Cannot say. 89 feet above adjoining river Severn. 



Ft. In, 



9. 1. Ked and variegated marl and sandstone 



2. Dark red sandstone 



3. Marly sandstone 



4. Eed marl . 



5. Marly sandstone 



6. Ked marl . 



7. Marly sandstone 



8. Purple marl 



9. Dark red sandstone 

 10. Purple marl 



Total depth 

 9a. No. 9. 10. No drift. 11. Surface springs cased out. 12. One, | mile 

 to the north, wending E.N.E. to W.S.W. 13. No. 14. Cannot say. 15. No. 

 16. The outcrop of the Permian sandstone, in which the above well is sunk, is | mile 

 south. 



Lincolnshire : — Gainsborough. 



The following are the details of the well and borehole carried out by- 

 Messrs. Timmins and Son, Runcorn, for the Local Board Waterworks, 

 acting on the advice of your reporter : — 



Surface about 25 feet above Ordnance datum. Well, with cast-iron 

 cylinders, 58 feet, with borehole to 1,100 feet from the surface, tubed 

 down to 737 feet with wrought-iron and cast-iron tubes, the last length 

 being llf inches internal diameter, lower portion of boring 10;^ inches in 

 diameter. The following is the section : — 



Ft. 



Keuper marls 725 



Good red sandstone 375 



At a depth of 900 feet the borehole began to yield water vigorously. 

 The present yield of the well is about 1,000 gallons per hour, and the 

 combined yield of the well and borehole about 9,000 gallons per hour, or 

 216,000 gallons per day. Analysis by Messrs. Green, Calvert, and 

 Thompson, Manchester, after seven days' continuous pumping : — 



Grains per gallon. 



Total solid matter 66-18 



Combined chlorine ...... 1'4011 



Permanent hardness 36° 



Temporary „ 10° 



"46° 

 The saline matter consists of — 



Grains 

 Chloride of magnesium 1-82 



Sulphate of soda and magnesium 

 Carbonate of lime „ „ 



Sulphate of lime 

 Organic and combined matter 



21-76 

 9-24 



28-02 

 5-34 



6618 



