384 ■ report — 1878. 



of your Committee prove might be made, by an efficient system of well- 

 boring, all that could be desired. 



Professor Hull has described from time to time the marked south- 

 easterly attenuation of the Triassic and other lower secondary strata, and 

 has given measurements, from which it appears the beds between Liverpool 

 and Warwick, 100 miles, thin out the following rates per mile : — 



\ 



Red marls 23 ft. per mile. 



Lower Keuper sandstone 3 „ 



Upper Mottled sandstone 5 „ 



Pebble beds 6^ „ 



Lower mottled sandstone 5 ,, 



The gradient is less between Staffordshire and Warwick, half the 

 distance — 



Red marls 2 ft. per mile. 



Lower Keuper sandstone 1 „ 



Bunter beds 9 „ 



With these figures it is interesting to calculate the thickness of the 

 Red beds under the Oolite of Burford, 40 miles south of Warwick ; and com- 

 paring them with the results actually obtained in the boring made by the 

 diamond process for Mr. Fox, the rate of thinning is found to again 

 largely increase, reaching eight feet per mile : — 



Calculated. Actual thickness. 



Redinarla 620j n(j j ^g ft 



Lower Keuper sandstone vOJ J 



Bunter series Nil. 



The details are as follows : — 

 Pump-house, Burford, Witney: — 



y Oolites. 



