98 PKOF. T. EtrPEET JONES ON COAX. 



the late Mr. Godwin-Austen and subsequently by Professor Prest- 

 wich." The boring was undertaken with the advice of Professor 

 "W. Boyd Dawkins; and we learn, from his Reports,* that the 

 Coal-measures were reached at 1,113 feet below high- water mark, 

 and were penetrated to 1,500 feet; also that in the 387 feet of 

 Coal-measures six seams were met with, giving an aggregate of 10 

 feet of coal. The distance of the Coal-measures below high-water 

 mark is a near approximation to Professor Prestwich's computation 

 of the probable depth at which coal might be found in that part of 

 Kent, namely, 1,000 to 1,100 feet.f The account of the coal- 

 plants or other fossils from these beds has not yet been published. 



On January 29th, 1892, Professor W. Boyd Dawkins communi- 

 cated to the Geological Society of Manchester;]: some further notes 

 on the Dover boring, with remarks on the probable results of this 

 successful search for coal. A still later account of work done 

 in the boring is given in the pamphlet : — 



' Dover Coal-Boring ; Observations on the correlation of the 

 Franco-Belgian, Dover, and Somerset Coal-fields.' By Francis 

 Brady. June, 1892, 8vo, 14 pages, with a map and section. And a 

 resume of this is published, under the title of ' Le Sondage de 

 Bouvres,'' par M. E. Lorieux, in the ' Annales des Mines,'' ser. 9, 

 vol. ii, 1892, pp. 227-232. 



The particulars as to the successive formations recognised, to 

 June 30th, 1892, are — 



Feet. 



Chalk-marl 174 



Upper Greensand 8 



Gault 1 -i 1 



Lower Greensand, Wealden, and Hastings beds 241 



Oolite (upper, middle, and lower) and Lias 613 



Coal-measures, with 8 workable coal-seams, comprising about "1 ^-g 



16 feet of bright bituminous coal J 



Total depth 1930 



The detailed list of strata show that the coal seams occur at — 



Along the indicated tract beneath South-eastern England, deep 

 borings have touched here and there cither strata lying just above 

 the coal, or below it ; and, as we have just seen, in one place 



* 'Report of Proceed. General Meeting South Eastern Railway,' 23 July, 

 1891, p. 10; 'Financial News,' 24 July, 1891. See also the 'Contemporary 

 Review,' April, 1890 ; and his ' Lecture to the Royal Institution,' June 6, 1890. 



t 'Trans. Manchester Geol. Soc.,' April, 1892. 



X ' Proc. Inst. Civil Engineers,' vol. xxxvii, 1874, pp. 16 and 26 of the 

 separate paper. 



§ Divided in the middle by 1 foot of sandstone. 



11 At 1549 ft. a film of coal. 



