234 Webster on Calton Hill. 
manufactory, nor conceal, with her accustomed reserve, the de- 
tails of the operations in which she is engaged.” ‘ 
From the appearances which have been thus briefly noticed, 
no impartial geologist, we should imagine, would infer the vol- 
- ganic origin of any portion of this formation ; and if the aqueous 
origin of sandstone cap be established, that of the wacke must be 
— 
From its intimate connexion with the preceding subject, De 
Webster subjoins the following : 
Extract from a Paper on a recent formation of Sandstone, oecur- 
: ing in various parts of the Northern coast of Cornwall ; by Jou 
Aysrow Panis, M. D. F. L.S., &c. &c. Published in the Trans- 
actions of the Geological Society of Cornwall, 1818. it 
% A VERY considerable portion of the northern coast of Corn- 
wall is covered with a calcareous sand, consisting of minute pat 
ticles of comminuted shells. That part which lies between St. 
Ives and Padstow is mote immediately the subject of the preset 
inquiry ; a tract which, with a few exceptions, is entirely cov" 
ered with this species of sand; and which, in some places; 
accumulated in quantities so great as to have formed hills of 
from forty to sixty feet in elevation. A considerable are for 
instance, in the parishes of Gwythian and Phillack has been thus 
and several churches have been inundated. In digs 
ing into these sand hills, or upon the occasional removal of some 
part of them by the winds, the remains of houses may be see? 
and jn some places, where the church yards have been over 
whelmed, a great number of human bones may be found. The 
sand is supposed to have been originally brought from the sea 
by hurricanes, probably at a remote period.’”,-———* The sand 
first appears in a slight but increasing state of aggregation ° 
seyeral parts of the shore in the bay of St. Ives; but 0° ap 
proaching the Gwythian river, it becomes more extensive and 
indurated. On the shore opposite to Godrevy Island, 3” at 
