Mr Smith of Jordanhill next read a paper on the direction of the striae on rocks and boulders in the West of Scotland.

It had generally been supposed that the cause, whatever it was, which lodged the erratic block beds in their present position had proceeded from the north and west.

This was true with respect to the basin of the Clyde and the east coast of Scotland; but on the western coast of Argyllshire, at Loch Crinan and Appin he had observed that the strike side (stoss seite) of the rocks pointed to the east, and the lee side (lee seite) to the west, shewing that, in these cases, the direction of the moving force was from east to west.