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ME. W. HILL ON A DEEP [Feb. I908, 



Cheeld, of Chesham (Bucks). It was 

 carried down 100 feet to blowing- 

 sand which choked the bore-hole, and 

 although some water occurred the 

 boring was abandoned. Messrs. 

 Cheeld say : 



* We started with fine gravel, which became 



sand as we got down. At 83 feet there was 



18 inches of clay, and between that and 



I ^ 100 feet there were several layers of this 



Qj material.' 



- - 8 Another boring was made by the 



'jl Hitchin Joint Hospital Board, in 



-^ order to obtain water for a new 



- -^ Isolation Hospital which it was pro- 

 ^ posed to build. The site of the 

 J boring was rather high on the 



I western slope, about 300 yards west 

 fl of the London, road, almost exactly 



^ opposite the third milestone from 



S Hitchin, and one-third of a mile 



y 'jf north-west of the last-described 



]- t boring. The level of the site was 



S some 318 feet above O.D. Chalk is 



'- ^ exposed about 300 yards west of the 



.-' ^ boring and about 800 yards east 



- 5 of it. The work was jDlaeed in the 

 .p hands of Messrs. Le Grand & SutcliflP, 



-_ J whose account is as follows : — 



Thick- Depth in 

 ^ nes^. feet. 



J Clay and flints 76 



Brown loamy sand 9 85 



^' Blue clay and flints 29 114 



'^ Brown blowing-sand ... 19 133 



-"- O Sand and gravel 21 154 



II Coloured clay 5 159 



' ^ Bubbly chalk and flints... 13 172 



.-- - Chalk and flints 28 200 



" '^ The blowing- sand at 133 feet was 



II probably the same bed as that en- 



£ countered by Messrs. Cheeld a little 



higher up the valley ; a thickness of 



159 feet of Drift was here pierced 



: before Chalk was reached. 



- So far the evidence of the channel 

 has been in the Langley-Ippollitts 

 Valley : hills of bare Chalk rise in 



Y- gentle slopes on each side, and on 



the maps of the Geological Survey 



