ARTESIAN WELLS IN DORSET AND ELSEWHERE. 189 



T^i? Bffvington Borehole (Figure i). For some years past the 

 troops encamped at Bovington had to be content with such 

 water as was supplied by a well a few hundred yards to the 

 S.S.E. of the recently-excavated borehole. The following par- 

 ticulars have been gathered respecting this well, but I cannot 

 guarantee that in all respects they are strictly accurate. It was 

 sunk in the Bagshot Beds about 1899, and is said to be 8yft. 

 deep: the water-level stands at 8zft. from the surface, and the 

 yield is 360 gallons per hour. The same Bagshot water-level 

 was struck in the borehole. On comparing these two water- 

 levels it is found that the one in the borehole stands at 85ft. 

 above Ordnance Datum, whilst that in the well stands at 73ft. 

 above O.D. This difference of izft. in a horizontal distance of 

 45oft. amounts to i in 37*5, showing a dip in the Bagshot Beds 

 of i^ to the S.S.E. This may not exactly represent the 

 direction of maximum dip, but there are good reasons for 

 believing that the line of maximum dip of the Bagshots here- 

 abouts is not far from S.S.E. 



Since the War Office was not satisfied with the amount of 

 water yielded by the well they bethought themselves of obtain- 

 ing an artesian supply, and accordingly entered into a contract 

 for the execution of a borehole, which was to be prosecuted to a 

 depth of booft., unless a good supply of water was reached at a 

 less depth.* Ultimately the boring was continued to a depth of 

 726ft., and the following is a summary of the beds encountered : 



Surface Beds, chiefly Plateau-gravel . . 14 feet. 



Bagshot Beds .. .. 151 ,, 



Lower Tertiaries (i.e., London Clay and 



Reading Beds) .. .. . . 115 ,, 



Chalk .. .. .. . . 446 



Total .. ..726 



* The engineers employed were Messrs. Le Grand and Sutcliff, of 125, 

 Bunhill Row, London, and the foreman of the works on the spot was Mr, 

 Harrodense. The operations lasted from July to November, 1906, 



