NEW II A VEX CLIFFS. 
59 
The hints or pebbles composing the breccia 
(No. 8.) are characterised by their green and fer- 
rnginons crusts. 
This appearance is so peculiar, that it frequently 
serves to identify the situations formerly occupied 
by the breccia, even where the stratum itself has 
been broken up. 'fhese pebbles are scattered 
over the ])loiighed lands on the summits and 
slopes of the Downs, near Tarring, Piddinghoe, 
Palmer, Stanmer, Bonner, and many other places 
in the vicinity of Lewes. I have also detected 
them in the diluvium of the interior of the country. 
Waterworn fragments of the breccia occasionally 
occur in similar situations ; some of considerable 
magnitude may be observed lying bare in the fields 
near Brighton church, Goldstone Bottom, and 
Faliner Hill.* 
posing pyrites, lies upon the chalk, which gives rise to the formation of 
sulphate of alumine : this is decomposed by the chalk ; and aluminous 
earth, selenite, and oxide of iron, are the results.” ( Manual of Chemistry, 
3 vols. 8vo. 1821. Vol. hi. p. 312.) 
In the Annals of Philosophy, for August 1820, INIr. Cooper, of the 
Strand, gives a description of an aluminous chalybeate spring, situated 
on the coast between Newhaven and Rottingdean. 
“ The spring is situated, as I understand, about midw-ay between New- 
haven and Rottingdean, at an elevation of about 15 or 16 feet above 
the level of the sea at liigh water mark. It issues from between the 
cliffs or fissures of the chalk in small streams, and these, when united* 
pour forth from twenty to twenty-five gallons in the hour. The 
chalk about the place is every where tinged with an ochreous deposit- 
Its temperature as it issues is 65° Fahr. and remains constantly the 
same. When I received it, there was a deposit of a brownish colour, 
which proved on examination to be oxide of iron. Its specific gravity, 
at the temper.atnre of 60'’ Fahr. was 1 076: it is slightly acidulous, 
changing the colour of litmus paper both before and after boiling, by 
which operation it deposits a further portion of oxide of iron, and also 
