aS a 
724 PROF. J. W. JUDD ON THE NATURE AND RELATIONS OF 
48. On the Nature and Rewations of the Junasstc Depostrs which 
underlie Loxpon. By Prof. Jonny W. Jupp, F.R.S., Sec. G.S. 
With an Iyrropucrory Norse on a Drzp Borine at Ricumonp, 
Sugrey. By Corzerr Homersnam, Esq., Assoc. M. Inst. C.E., 
F.G.S. (Read February 6th and June 25th, 1884.) 
[Puate XXXTITI.] 
ConTENTS. 
I. Introductory Note on the Richmond Well. 
II. General Remarks on the Geological Bearings of the Undertaking. 
III. The Tertiary Strata. 
IV. The Chalk. 
VY. The Upper Greensand. 
VI. The Gault. 
VII. The Neocomian (?) Beds. 
VIII. The Great Oolite. 
IX. The Great-Oolite Strata at Messrs. Meux’s Well in the Tottenham 
Court-Road. 
X. General Characters of the Great-Oolite Strata under London. 
XI. The Poikilitic (?) Strata. 
XII. Conclusion. Bearing of the Facts described upon the following Ques- 
tions :-— 
A. The Position and Nature of the “ Palxozoic Axis,” and its 
Relations to Overlying Strata. 
- B. The Water-Supply of the Metropolis. 
C. The possible Existence of Coal at Workable Depths under 
London. 
[The paragraphs in brackets have been added or modified since the reading 
of the paper. | 
I. Intropuctory Note on tHE Ricumonp WEILL. 
THe well and bore-hole (see fig. 1, p. 744) which have revealed 
the particulars of the strata described in this paper are sunk on the 
premises of the Richmond Vestry Waterworks, situated about 160 
yards below Richmond Bridge, on the right bank of the Thames. 
The common centre of the well and bore-hole is about 33 yards 
distant from the high-water line of ordinary spring tides. The 
altitude of the surface of the bore-hole is about 17 ft. above 
Ordnance datum. 
The well, which has an internal diameter of 7 ft. at top and 5 ft. 
at the bottom, was sunk in 1876 for the purpose of supplying water 
to the town of Richmond, and was carried down to the Chalk, which 
was met with at 253 ft. below the surface. 
From the bottom of the well a 24-in. bore-hole was further sunk 
to the total depth of 434 ft., thus penetrating 181 ft. into the Chalk. 
This well and bore-hole were completed in the summer of 1877. 
The Tertiaries passed through were represented by 160 ft. of 
London Clay, 60 ft. of the Woolwich and Reading beds, and some 
underlying sands. 
