[Sidenote: GEOLOGICAL CHANGES.] Of these terraces I have frequently made mention in this journal, and their existence in all similar localities has been before remarked. They have much geological interest, as illustrating the gradual upheaval of that part of Greenland lying north of latitude 76°; and the interest attaching to them is heightened when viewed in connection with the corresponding depression which has taken place, even within the period of Christian occupation, in southern Greenland. These evidences of the sinking of the Greenland coast from about Cape York, southward, are too well known to need any comment in this place; but I may dwell, for a few moments, upon the evidences of rising of the coast here and northward. At many conspicuous points, where the current is swift and the ice is pressed down upon the land with great force and rapidity, the rocks are worn away until they are as smooth and polished as the surface of a table,--a fact which may at any time be observed by looking down through the clear water. This smoothness of the rock continues above the sea, to an elevation which I have not been able with positive accuracy to determine in any locality, but having a general correspondence to the height of the terraces at Port Foulke, which, as before observed, rise one hundred and ten feet above the sea-level. At Cairn Point the abrasion is very marked, and, where the polished line of syenitic rock leaves off and the rough rock begins, is quite clearly defined. This same condition also exists at Littleton Island (or, rather, McGary Island, which lies immediately outside of it) to an almost equally marked degree. I have before mentioned the evidences of a similar elevation of the opposite coast found in the terraced beaches of Grinnell Land.