1848.] DARWIN ON THE TRANSPORTAL OF ERRATIC BOULDERS. 323 
not suppose that the boulders over the whole area of subsidence are 
carried far up, but only those in certain favourable situations. 
Secondly, several Arctic voyagers have stated that the pack-ice fre- 
quently piles up and leaves masses of boulders at a height of even 
20 and 30 feet above high-water mark ; now after a subsidence, the 
ice during the first gale would drive these boulders still higher up, 
and so onwards and upwards, with scarcely any tendency to carry 
them out to sea. In a bay open to the prevailing winds, and with- 
out any river entering it, I should imagine that the coast-ice would 
rarely be drifted outwards. Thirdly, I believe that any floating ob- 
ject thrown into the water not far from an extensive coast-line, is 
generally driven soon on shore: this certainly seems to be the case 
with the wrecks of boats; and if so, any ice-borne boulders, carried 
by the wind off the land, would generally be again thrown on the 
coast. 
3. On Scratched Boulders. Part I. By James Smiru, Esq. of 
Jordan Hill, F.R.S.L.&E., F.G.S. 
(The publication of this paper is postponed im order that it may 
appear in connexion with the second part read at a subsequent meet- 
ing of the Society. | 
