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of the high level gravels met with further inland, notwith- 
standing the fossils discovered in them, which are of the same 
kind, although not so numerous, as those met with in the 
gravels of Bowdon, Cheshire, and the sands of Haigh, 
Lancashire. He also said that the lowest bed of till seen at 
Blackpool, and containing the shells previously alluded to, 
had all the physical characters of the Scottish, Irish, and 
North of England iceberg and glacial drift, and had been 
subject to considerable elevations since its deposition. 
Mr. R. D. Darbishire stated that he had lately found 
under undisturbed clay at a considerable elevation on the 
southerly slope of Great Orme’s Head, a deposit of bones of 
different mammalia intermixed with shells of mytilus, littorina, 
and patella. He hoped to lay the results of further observa- 
tions before the Society on a future occasion. He supposed 
the deposit might be connected with the present or past 
existence of some “ bone cave” in the limestone rock of the 
Head. 
He suggested, however, that possibly the bones and shells 
may have been the remnants of the cookery of former 
inhabitants of the district, and referred, in illustration, to 
the researches made amongst the Kjokkenmoddings on the 
coasts of Denmark. 
Dr. Joule, in reference to speculations on the thickness of 
the earth’s crust, stated that he had some time ago received a 
letter from Professor Thomson, giving an account of the 
progress of investigations calculated to throw light on this 
interesting subject. Professor Thomson finds that the 
