That the sea is deeper than was formerly admitted, is now fully confirmed. We have before alluded to the results obtained by Captain Denham, of H. M. ship Herald, who found bottom at 7,706 fathoms, or about nine English miles. Now, whether that spherical shell, which we have contended to be the true form of the solid earth, be continuous and entire; or, whether it may not be wanting in localities of limited extent where the ocean would be absolutely unfathomable, we know not; but if such be the internal constitution of our globe, there will be, no doubt, many channels of communication between the internal and external ocean, and, as a consequence of the earth's rotation, the axifugal current of the Arctic sea may be supplied by an upward current from the interior of the globe; and this current may have a higher temperature than the surface waters of that sea, and thus the middle portions may, in truth, remain open the whole year round, and be teeming with animal life. According to Captain Penny's observations in 1850, whales and other northern animals existed to the westward, where he saw the open sea stretch out without a bound before him. It has been a question mooted by some, that Franklin's ships might be overtaken, at an early stage of the voyage, by a storm, and foundered amidst the ice. The theory would give a negative answer to this question. Stiff gales may prevail far to the north when the vortices do not reach so high; but no storm, properly speaking, will be found far beyond their northern limit. After the coming winter (1853), the vortices will gradually penetrate farther and farther to the northward, and the years 1857, 1858, and 1859, will be highly favorable for northern discovery, accompanied, however, with the necessary draw-back of tempestuous weather. FOOTNOTES: [48] The reader will of course understand these as celestial longitudes, and the latitudes as terrestrial. [49] Mr. William McDonald, of Canada. CONCLUSION.