ARTESIAN WELLS IN DOkSET AND ELSEWHERE. 201 



The Chalk, however, was found to be very compact at this depth 

 and, as there was no sign of more water at the lower level, the 

 sinking of the well was stopped at 21 oft. from the surface and 

 the bottom concreted! The bottom of the well, therefore, is 

 about 1 45 ft. below O.D. 



The horizontal section also serves to show the character of 

 the Headings. The Lower Heading was first commenced in 

 1899 at a depth of i95ft. from the surface, and excavated on 

 opposite sides of the main shaft. In the course of a few months 

 a total length of about Sooft. was attained, and the flow of water 

 was considered equal to about i| million gallons per day. In 

 July, 1899, fresh Headings (the Upper Heading) were started at 

 a level of i55ft. from the surface in softer Chalk, much fissured ; 

 the result by November was a flow of water somewhat exceeding 

 ij million gallons per day. At present I have no precise 

 information as to the level produced by natural hydrostatic 

 pressure in the well, but the pumping arrangements are so 

 complete that this level is soon lowered not only in the 

 " Bournemouth " Well, but in all other wells, and the exhaustion 

 is certainly felt as far as Kingston Lacy, two miles distant. 

 The total yield of water is anticipated at 3 million gallons per 

 day. 



Notes on some Artesian Wells elsewhere in England. There can 

 be no doubt that artesian boring is somewhat of a lottery. To 

 demonstrate this two examples may be selected. The first of 

 these relates to a boring in Berkshire right through the Chalk 

 without finding water. In 1895 a boring was made at New 

 Lodge (Windsor Forest), Winkfield. The following are con- 

 densed particulars : 



Thickness. Depth. 



London Clay .. .. 13 6ft. i3ft. 



Reading Beds .. .. 7 8ft - I 4ft. 



Chalk .. .. 7 2 5*t. 939ft- 



Upper Greensand .. 3 lft - 97 oft - 



Gault .. 26 4 ft. 1234ft. 



Lower Greensand (water) .. 9^- 1 243ft. 



