152 PROF. E. HULL ON AN ARTESIAN BORING [May l894 r 



11. Artesian Boring at New Lodge, near Windsor Forest (Berks). 

 By Prof. Edward Hull,] M.A., LL.D., F.B.S., F.G.S. (Bead 

 December 20th, 1893.) 



Having availed myself of the opportunity offered by a few weeks' 

 residence in the neighbourhood of Windsor Forest, during the summer 

 of 1893, to visit a remarkable boring for water carried out at New 

 Lodge in Berkshire, of which notices appeared in several newspapers 

 some little time ago, I propose to lay before the Society the infor- 

 mation obtained on the occasion referred to, Monday, the 28th August 

 last. 1 



The boring was carried down by means of the diamond drill at 

 the rear of New Lodge, the residence of Mr. Van de Weyer, at 

 a level of about 220 feet above Ordnance datum, and commences in 

 the London Clay not far from the base of the Bagshot Sands, which 

 set in a short distance southward in the direction of Windsor Forest. 2 

 Without going into minute details of the boring, the following 

 summary will suffice to show the nature of the strata passed through 

 from the surface to the total depth of 1241 feet 3 : — 



Thickness 

 in Feet. 



Tertiary (London Clay • ••• 1 2 14 



'" \ Lower London Tertiaries ... J 



( Chalk ( Upper and Lower) 725 



Cretaceous j Upper Greensand 31 



Strata. j Gault Clay 264 



^ Lower Greensand 7 



Total 1241 



When the boring was commenced it was expected that it would only 

 be necessary to enter the Chalk in order to find the requisite water- 

 supply, and a diameter at the surface of 1\ inches was considered 

 sufficient to allow for tubular lining to this depth. Much dis- 

 appointment was, therefore, felt when it was found on reaching this 

 formation, at a depth of 215 feet, that the rock was hard and contained 

 very little water ; and it was thereupon determined to continue the 

 boring down into the Lower Greensand — as the next most likely 

 source of supply. With a diameter at the commencement of only 

 7g inches some anxiety was necessarily felt as to whether this 

 formation could be reached by means of a tubular bore with the 

 necessary lining ; and, as the result proved, the apprehension was 

 well founded. But fortune was on the side of the experiment. The 

 borer entered the Lower Greensand with a diameter of \\ inch, 

 and had not penetrated into this formation for more than 7 feet 



1 I have to acknowledge the assistance and information readily afforded by 

 Mr. Menzies, of Englefield Green, and by Mr. Rose, the bailiff of the estate. 



2 That the locality was originally part of this extensive forest is shown by 

 the presence of several noble oak-trees of great age. 



3 The work was carried out by the firm of Le Grand and Sutcliff, London. 



