200 ARTESIAN WELLS IN DORSET AND ELSEWHERE. 



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Some of the particulars of 

 the " Bournemouth " Water- 

 works may be gathered from 

 a study of Figure 3.* The 

 details relating to the subsidi- 

 ary boreholes, &c., are mainly 

 of an engineering character, 

 and need not be dwelt upon in 

 the present communication ; 

 but there are some points of 

 geological interest to which 

 attention may be directed. 

 A 21 in. trial borehole was 

 commenced in 1894 and 

 finished in 1895 ; boring was 

 continued to a depth of 2231^, 

 and it was noticed that the 

 greatest increase in the yield 

 of water took place shortly 

 before arriving at that depth, 

 the Chalk removed appearing 

 to be much softer. The well 

 was started in 1896 diameter 

 first lift, and then loft. 

 and in February, 1899, on its 

 attaining a depth of 21 oft., 

 a 6in. trial boring was sunk 

 to a further depth of 45ft., 

 i.e., to 255^. from the surface. 



* The horizontal section of the 

 Bournemouth Waterworks at Wim- 

 borne is reproduced, by the kind 

 permission of the Editor of " Water " 

 and of Mr. Cripps, the engineer of 

 the works. (See paper by Mr. Cripps 

 in " Water," September, 1906.) 



