Geological Society. 395 
of Copper brought by Dr. Heyne from the East Indies. 
The mineral he considered a new species (perhaps he meant 
variety) of carbonate of copper; but his description was ap~ 
plicable to many specimens found in this country. His 
paper, although sparing in experimental details, was copiously 
supplied with calculations. He put 100 grs. of the mineral 
into a bottle of sulphuric acid, stopped it with cotton, and 
afterwards calculated the quantity of carbonic acid disen- 
gaged. The mineral contained about 19 per cent. of iron, the 
remainder was carbonate of copper and crystals of quartz 5 
the latter were very small. 
GEOLOGICAL SOCIETY. 
Noy. 5.—S. Woods, Esq. Treasurer in the chair, 
Edw. Horne, Esq. of Bookham, Surry ; 
The Rev. J. Holme, Fellow of St. Peter’s College, 
Cambridge; 
Charles Hampden Turner, Esq. of Limehouse, were 
severally elected Members of the Society. 
The continuation of Mr. Webster’s paper ‘¢ on the fresh- 
water formations of the Isle of Wight, with some observa- 
tions on the strata lying over the chalk,”’ was read. 
Having in the former part of this paper given a general 
account of the chalk and of the beds lying above this rock 
in the Southern or Isle of Wight basin, and in the London 
basin, Mr. Webster next proceeds to a more particular de- 
scription of them, with a comparison between these and 
those which occur in the basin of Paris. 
The beds lying between the chalk and the fresh-water 
formation (or the lower marine formation, as it is called by 
the author of this paper,) are to be observed with peculiar 
distinctness at Allum Bay in the Isle of Wight. ‘hey as 
well as the chalk are here nearly vertical, but have evi~ 
dently undergone no other alteration, except this change of, 
position. 
The first bed, and immediately incumbent upon the 
chalk, is the chalk marl: it consists of chalk intimately 
mixed with clay, and is readily distinguishable from pure 
chalk by the ease with which it falls to powder on exposure 
to the weather. It contains no flints. It appears to have 
been generally spread over the bottom of the Isle of Wight 
basin, being found in that part of Sussex which is south, 
of the S. Downs, and occurring somewhat further to the 
W. than Corfe Castle in Dorsetshire, It has not how- 
ever been met with in the London basin. 
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