Vol. 56. j PKOCEEDINGS OF THE GEOLOGICAL SOCIETY. V 



The following table of particulars has been supplied by the 

 contractors : — 



Feet. Inches. 



Dug Well 170 



Concrete 8 



New Bore-hole 294 6 



Total depth 472 6 



Strata traversed by the New Bore : 



Feet. Inches. 



1. Grey Sand 1 



2. Mottled Clay 5 



3. Green Sand 9 



4. Sand and Pebbles 8 



5. Dead Grey Sand 12 



6. Flints 1 



7. Chalk 238 



8. Grey Chalk 20 6 



294 6 . 



The President said that no doubt the mottled clay, green sand, 

 and sand-and-pebbles were Woolwich and Reading Beds, and the 

 dead grey sand was Thanet Sand. What was described in the table 

 as ' Grey Chalk ' was probably Upper Chalk, the grey colour only 

 being due to the fact that it was wet when first observed. 



Prof. Boyd Dawkins remarked that the ; dead grey sand ' and the 

 1 Grey Chalk ' of the section were Thanet Sand and Upper Chalk. The 

 section was a valuable addition to the literature,of the water-supply 

 from wells in the surrounding district. 



The following communications were read : — 



1. 'On some Effects of Earth-movement on the Carboniferous 

 Volcanic Rocks of the Isle of Man.' By G. W r . Lamplugh, Esq., 

 F.G.S., of H.M. Geological Survey. (Communicated by permission 

 of the Director-General of the Geological Survey.) 



2. 'The Zonal Classification of the Wenlock Shales of the Welsh 

 Borderland.' By Miss Gertrude L. Elles. (Communicated by 

 J. E. Marr, Esq., M.A., F.R.S., F.G.S.) 



3. ' On an Intrusion of Diabase into Permo-Carboniferous Rocks 

 at Frederick Henry Bay (Tasmania).' By T. Stephens, Esq., M.A., 

 F.G.S. 



The following specimens and sections were exhibited : — 



Cores from and Section of a Well-boring in the Zoological Society's 

 Gardens, exhibited by Dr. P. L. Sclater, M.A., F.R.S., P.G.S. 



Rock-specimens and Microscope-sections, exhibited by G. W. 

 Lamplugh, Esq., F.G.S., in illustration of his paper. 



Specimens of Wenlock Graptolites, from the district of Builth 

 vol. lvi. b 



