468 Notices of Memoirs—Dr. H. C. Sorby’s Address. 
W. T. Blanford, F.R.S., F.G.S.—On the Geological Age and Relations 
of the Sewalik and Pikermi Vertebrate and Invertebrate Faunas. 
E. Wethered, F.G.S.—On the Sandstones and Grits of the Lower and 
Middle Series of the British Coal-field. 
Dr. H. Hicks, F.G.S.—On some Pre-Cambrian Rocks in the Harlech 
Mountains. 
Prof. J. Prestwich, M.A., F.R.S.—On a Raised Beach with Diluvial 
Drift in Rhos Sili Bay, Gower. 
Prof. J. Prestwich, M.A., F.G.S.—On the Geological Evidence of the 
Submergence of the South-west of Europe during the early 
Human Period. 
Charles Moore, F.G.S.—Proofs of the Organic Nature of Hozoon 
Canadense. 
J. H. Oollins, F.G.S.—On the Fault-systems of Central and West 
Cornwall. 
Dr. G. M. Dawson, F.G.S.— Sketch of the Geology of British Columbia. 
Dr. J. S. Phené, F.G.S.—On the Geology of the Balearic Islands. 
Prof. W. J. Sollas, M.A., F.G.S.— On the Action of a Lichen on 
Limestone. 
Prof. W. J. Sollas, I.A., F.G.S.—On a Striated Stone from the Trias, 
of Portishead. 
Prof. W. J. Sollas, M.A., F.G.S.—On Sponge Spicules from the 
Chalk of Trimmingham, Norfolk. 
W. H. Baily, F.G.S.—Report on the Tertiary Flora of the Basalts 
of the North of Ireland. 
Rev. H. W. Crosskey, F.G.S.—Report on the Erratic Blocks of 
England and Wales. 
W. Whitaker, B.A. Lond., F.G.S.—On the Geological Literature 
of Wales. 
Lieut.-Col. Godwin- Austen, F.R.S.—On the Post-Tertiary and Glacial 
Deposits of Kashmir. 
R. Bruce-Foote, F.G.S.—Notes on the Occurrence of Stone Imple- 
ments in the Coast Laterite, South of Madras, and in High Level 
Gravel and other formations in the South Mahratta Country. 
C. E. De Rance, F.G.S.—On the Pre-Glacial Contours and Post- 
Glacial Denudation of the North-west of England. ; 
II._-British AssocraTIoN FOR THE ADVANCEMENT OF SCIENCE, 
Swansea, Aveust 26,1880. Address to the Geological Section 
by Henry Clifton Sorby, LL.D., F.R.S., F.G.S., President of the 
Section. 
| a selecting a subject for an address to be given in accordance with the custom of 
my predecessors, I was anxious that it should be, in some way or other, connected 
with the locality in which we have met. If I had been adequately acquainted with 
the district, I should have thought it incumbent on me to give such an outline of the 
general geology of the surrounding country as would have been useful to those 
attending this meeting. I am, however, practically a stranger to South Wales, and 
must therefore leave that task to others. On reflecting on the various subjects to 
which I might have called your attention, it appeared to me that I could select one 
which would be eminently appropriate in a town and district where iron and copper 
are smelted on so large a scale, and, as I think, also equally appropriate from a 
geclogical point of view. This subject is the comparative structure of artificial slags 
