362 



REPOKT — 18^7. 



Strata of trial bore only 145 feet above sea level. 



9. Superficial Brift. Ft. 



A . Sandy gravel 5 



B . Drift clay or brick earth 9 



Tertiary. 



C . London clay 56 



D . Here occurred a thin vein of sand, yielding water in small qnantitv 

 E . London clay (continued) with sand and shells . . .40 



F . Here occurred a stratum of hard cement stone, under which water 

 was found, rising to within 5 ft. of surface, but not in any consider- 

 able quantity, about 10 or 12 inches thick 

 G London clay (continued) becoming gradually more sandy . . .30 



Lower Lmidon Tertiaries. 

 H . Dark sand, with a few shells, yielding water in considerable quantity, 



which stood at 3 feet from surface .... . . 10 



I . Mottled clays of smooth texture, veined like marble, and taking a 



polish from the knife 45 



(These clays became gi'adually more sandy, with specks of chalk, 



and at 194 feet changed suddenly to a coarse black sandy clay) 



K . Light- coloured sands, firm and hard, becoming darker and more 



friable 20 



L . Another series of light -coloured sands, changing to coarse dark . . 13 



Secondar)/. 

 M . Chalk at 228 feet from surface. In this water was found in abundance, 

 rising to and standing at about 12 feet from the surface permanently. 



9a. In D, F, H, and M. lO. Yes ; one known of about 25 yards from well. 11. 

 Yes. 12. Not known. 13. No. 14. None known. 15. None known. 



In tlie Ninth Report of this Committee, 1883, and also in the Twelfth 

 Report, that for last year, is a weekly record of the level of the water in 

 Messrs. Samuel Courtauld and Co.'s well at Booking, Braiutree, Essex, 

 communicated by the courtesy of Mr. Radford Sharpe : this record is 

 now continued. The well datum is 187'02 feet above the mean sea-level. 

 The observations are taken every Monday morning at 6 a.m. ; no water is 

 taken on a Sunday. The rainfall observations given in the parallel 

 columns in the first record are from a record kept at Fennes, Braintree, 

 by Mr. S. Tabor, about a mile from the well. 



For comparison with the table now given the following is the height of 

 the water above datum, in inches, on the last Monday of each month : — 



The Essex earthquake happened on April 22, 1884 ; on April 21 the 

 water in the well was 12 inches above datum ; on the following Monday, 

 the 28th, it was 31-^ inches, steadily increasing until July 7 of the same 

 year, when it stood at 58^ inches. Since then it has been steadily de- 

 creasing, and should the same rate continue until this month next year the 

 remarkable lifting of the permanent water-level in Essex by the earth- 

 quake of April 1884 will have ceased to exist. 



