198 
Proceedings of the Boyal Society 
Time/’ makes the following reference : — “ In every part of the globe 
where glaciation has been found, evidence of the submergence of 
the land has also been found along with it.” “ The submergence 
of our country would of course have allowed floating ice to pass 
over it, had there been any to pass over; but submergence would 
not have produced the ice, neither would it have brought the 
ice from the Arctic regions, where it had already existed.” — 
(Page 390.) 
Of course, there must have been some oceanic current from the 
north-west sweeping over this part of Europe, and which continued 
from time to time, as the sea fell, bringing boulders to be deposited 
from ice-floes on the hills. Where the boulders came from, cannot 
at present be even conjectured. The fact only is established that, 
when the boulders came, the sea stood at least 2000 feet above 
its present level, and that there was a north-west current, with 
floating ice, which brought the boulders. 
It is hoped that this boulder inquiry will continue. There is 
now more than geological interest attaching to it, for the facts seem 
to throw light on important astronomical questions connected with 
the physical condition of our planet. Mr Croll’s theory is, that at 
one period, ice had accumulated at the North Pole to the extent of 
three or four miles in thickness, which would of itself cause an 
elevation of the sea, for reasons explained by him, and resting 
apparently on sound principles. 
Before concluding these remarks upon the Hebrides boulders, 
and upon the evidence they afford of a transport from the north- 
west, I wish to refer to a confirmation of these views which I have 
had much pleasure in finding from the last Report of the Boulder 
Committee of the British Association. In this Report an interest- 
ing account is given of individual boulders and groups of boulders 
in Leicestershire. In most of the cases mentioned, the parent rocks 
have been discovered, and in all these cases, these parent rocks are 
situated to the north-west of the boulders. 
With regard to the general direction of the agency concerned in 
the transport of boulders, and the smoothing of rocks in the dis- 
tricts embraced in the Report, which is shown to have been from 
W.N.W., it is important to remark that there are exceptions, and 
to note the circumstances on which these exceptions occur. 
