intercourse_ with a southern continent, &c!", A zeal so red-hot as this, could scarcely be cooled down to any thing like common sense, on one of the fields of ice encountered by Cook in his second voyage; but what a pity it is, that it should not be accompanied by as much of the inventive faculty, as might serve to point out how impossibilities can be performed, and insuperable obstructions removed! It is but justice to this gentleman to say, that his willingness to undertake such a task, was as enthusiastic as his idea of its magnitude and importance. His industry, besides, in acquiring information in this department of science, and his liberality in imparting it, were most exemplary. On the whole, therefore, saving the circumstances of fortune and success, he may be ranked with any of the heroes of former times! It would be well to remember, that the Deity is not bound to act according to our notions of fitness; and that though it may not always be easiest, yet it is certainly most modest to form our theories from a survey of his works, rather than the nursery of our own prejudices. The following observations may be of utility to some readers. The motion of the earth about its axis is uniform, and quite unaffected by the irregularities on its surface or of its density. This is a fact to be admitted, not an opinion to be proved. But in point of reasoning, it is quite demonstrable, that the highest mountain on the surface of the earth, bears no larger a proportion to the magnitude of the earth, than a grain of sand does to that of one of our largest globes, and can have no more effect on its motion: Besides, as is noticed by Mr Wales, every body will be _in equilibrio_, however irregular, when it is suspended or revolves on a line passing through its centre of gravity, and will not have either its rest or motion disturbed by any irregularities lying in the direction of that line, which may be safely supposed the case with our earth. The simple addition of any fluid matter to a body so circumstanced, will not cause any aberration, as it will distribute itself in the parts nearest to the centre of gravity, without regard to the centre of the body, which may or may not be the same. The principal tracts of both land and sea may be held to extend from the North towards the South Pole, and are accordingly in the direction of the earth's axis. Obviously, therefore, there is no necessity for a southern continent to answer as a counterpoise; and it is even conceivable that the matter in the regions of the South Pole, is specifically lighter than that of any other part, in perfect consistency with what is known of the earth's motion. The reasons of a different kind from what have now been mentioned, for the existence of southern lands, fall to be elsewhere considered.--E.