Archer says: “In order to utilize this principle, it was decided to depart entirely from the usual deep-bilged form of section and to adopt a shape which would afford the ice no point of attack normal to the ship’s side, but would, as the horizontal pressure increased, force the attacking floes to divide under the ship’s bottom, lifting her as described above.... Plane or concave surfaces were avoided as much as possible by giving her round and full lines. This, while increasing the power to resist pressure from outside, also had the advantage of making it easy for the ice to glide along the bottom in any direction.” As great length is an element of weakness, the _Fram’s_ length was cut down as much as possible, with a tendency to make its form circular or oval. Various expedients were adopted to reduce the dead weight of the ship by a judicious arrangement of materials. While economizing weight, the cargo-carrying capacity of the ship could not be too much reduced, and the great strength of the ship must be preserved. Inasmuch as the broadside of the ship, both structurally and from its shape, is its weakest part, it was necessary to adopt extraordinary measures to strengthen it. This was done largely by adding stays of yellow pine placed nearly at right angles to the ship’s sides, and securely fastened with wooden knees. These were supplemented with upright stanchions tied by iron straps. While experienced whalers strongly advocated the square rig, Archer decided to ignore their advice and rigged the _Fram_ as a fore-and-aft three-masted schooner, which style of rig proved, under the circumstances, to be most suitable. The slight increase in leakage is believed by Archer to be due in part to the drawing of the oakum out of the seams and in part to the expansion and contraction of the timbers. While the _Fram_ was not subjected to such tremendous ice convulsions as have been many other Arctic ships, yet her experiences were very severe and may be considered to prove that the design and system of construction adopted were the most efficient possible. [Illustration: THE FRAM.] The most extensive, if not the most important, of the treatises that form this volume, relate to regions and investigations with which the voyage of the _Fram_ were only incidentally connected. Reference is had to the papers on the geological formations of Cape Flora, Franz Josef Land, by Professors Nansen, Pompeckj and Nathorst. Dr. Nansen most cordially acknowledges his great indebtedness to Mr. Jackson and Dr. Reginald Koettlitz, respectively the leader and geologist of the Jackson-Harmsworth expedition to Franz Josef Land, 1894-1896. The latter of these gentlemen, in a spirit of broad scientific generosity, accorded Dr. Nansen full and equal access to his discoveries, covering three years’ work on Northbrook Island, among fossils and geological conditions of special interest. [Illustration: MAP SHOWING REGIONS TRAVERSED.]