Professor Nichol conceives that, as the upheaving cause is a general or cosmical phenomenon, no true or complete theory of it can be deduced from a review of its merely terrestrial actions; and in the notice read to the Society, he called the attention of geologists to a few general but important inferences, from the peculiar form of the elevations in the moon.

The author introduced his observations, by adverting to the following facts, as now ascertained and generally known concerning these elevations.