386 SCIENCE PROGRESS 



These three borings, Dover, Ellinge, and Ropersole, re- 

 mained the only ones which proved the Coal Measures, until 

 the renaissance of Kent Coal in 1905. 



The Brabourne boring was very important ; by attaining 

 the Devonian Rock at a depth of 1,921 ft., it demonstrated the 

 existence of the anticline at that point, and this limited the 

 south-easterly extension of the coalfield. 



The section is as follows : 



IV. The Dark Ages 



With the stoppage of the Ellinge boring in 1901, Kent Coal 

 fell into a period of stagnation, of which the monotony was 

 only relieved by occasional news from the ill-fated pits at 

 Shakespear's Cliff. 



V. The Renaissance 



But in 1904 there came into existence a new company named 

 the Kent Coal Concessions, Ltd. After working in silence for 

 some months it started a boring at Waldershare Park, in the 

 Earl of Guilford's estate, at an altitude of about 335 ft. above 

 CD. 



This boring was eventually carried down to a depth of 

 nearly 3,000 ft., and gave the following sections : 



Thickness Depth 



813 ft. Chalk and Marl 



163 „ Gault 976 ft. 



70 „ Lower Greensand . . . 1,045 » 

 42,, Wealden 1,086 ft. 6 in. 



307 ft. 6 in. Oolites and Lias . . . 1,394 „ 



Entered the Coal Measures at 1,394 ft. 



