28 W. WHITAKEE ON SOME BOEINGS XN EIENT. 



seen, it would be well that they should be examined on the spot, 

 and special parts selected for more detailed examination at Jermyn 

 Street. 



In accordance with this suggestion, Mr. E. T. Newton was sent 

 to Chatham, and he has given me many useful notes, besides assist- 

 ing Mr. Sharman in the determination of the fossils. 



This paper originally referred to Chatham only ; but, in order to 

 make it as complete as possible, accounts of other unpublished deep 

 borings in Kent which pass through the Chalk, have been added. 

 The details of two of these were not received until the day on which 

 the paper was read, and some further notes of the Dover boring 

 have come to hand since. 



B. Details oe the Boeings. 



The following account of the beds passed through in the Chatham 

 wells has been compiled from various documents, mostly unpublished, 

 and from the examination of specimens. To Col. Percy Smith, R.E., 

 Director of Works at the Admiralty, the Geological Survey is in- 

 debted for a set of specimens from the second well and for informa- 

 tion about it. In all cases words in square brackets have been 

 inserted by myself. 



1. Chatham Bockyard Extension. — Well No. 1. 1868-1878. 



E. A. Beenats. Lectures on Chatham Dockyard Extension 

 Works. Delivered at the School of Military Engineering, Chatham. 

 Eor private circulation. Eol. Chatham: 1879. Pp. 13, 14. 



Measurements from the coping-level of the new basin = 5| feet 

 above high water of ordinary spring tides. 



Shaft and cylinders 67 feet, the rest bored. 



At a depth of 301 feet an ample supply was found; but the water 

 was very hard and of bad quality (from infiltration from the river) ; 

 it was therefore shut out. Water rose from the bottom and over- 

 flowed ; it was found that it would rise to 19 feet above the 

 ground. 



The flow was at the rate of 80 gallons a minute, which continued 

 [for some time], the water being soft and good, with a temperature 

 of 65°. 



Thickness. Depth, 



ft. in. ft. in. 



Made ground and alluvial mud 12 12 



[River Drift.] Loamy gravel 10 6 22 6 



[Thanet Beds ?] Loam 3 25 6 



r Soft chalk 22 47 6 



Chalk, 684f ft... <^ Hard chalk 552 599 6 



[Chalk Marl 110 6 710 



rGault[clay] 191 6 901 6 



[Eock[? nodules] 9 903 6 



To [Lower] Greensand. 



