SCIENTIFIC NEWS. 
m 
the grass of instratified granular marble, varying in colonr 
from pure white to gray, the geological relation of which. Dr. 
M. has not been able to determine. This is the white marble 
mentioned by Williams in his <f Mineral Kingdom,” and which 
has since been wrought with some success, by Mr. Sophir of 
Gateshead. 
May 21, J813. 
The President in the Chair, 
William Hill, Esq. Bedford Row, 
Hastings Elwin, Esq. of Farnham, Dorset, 
Frederic Daniell, Esq. of Lincoln’s Inn Fields, were ‘severally 
elected members of the Society. 
A' paper by the Rev. William Greg, Hon. M. G. S, con- 
taining “ Observations on a species of Tremolite found in 
Cornwall,” was read. 
This mineral occurs in a dark green serpentine rock forming 
the ridge called Clicker tor, in the neighbourhood of Liskeard, 
It is accompanied by Asbest. On analysis it appears to be 
composed of 
6'2’2 silicia 
14' 1 lime 
12'9 magnesia 
5‘9 oxid of iron 
TO water 
A trace of oxide, of manganese, and of soda, 
96- 1 
3'2 loss 
100 0 
The continuation of Dr. Mac Culloch’s paper on the geology 
of differents parts of Scotland was read, and thanks were voted 
for the same. 
The granular quartz of Isla appears to be precisely the same 
rock, or the sandstone of Jura, already mentioned. From the 
observations of Pr. Jameson, coinciding with those of Dr. Mac 
Culloch it appears to alternate with mica slate and clay slate, ; 
and with a very important formation of limestone. This lime- 
stone 
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