A careful examination of Figs. 11, 14 and 17 will show that from an artistic point of view these examples of steam carriages are satisfactory. In regard to their operation it can be said that they have sufficient power to run up the steepest grades encountered on ordinary roads at a fair rate of speed, while on level ground their velocity is more than enough to satisfy the average rider. The danger of explosion is so remote that it need not be considered. The Serpollet boiler is practically inexplosive, while those used in the American vehicles are so constructed that they can withstand a pressure far greater than any they can be subjected to in practice. It might be expected that the motion of the machinery would produce an unpleasant vibration, but on account of the lightness of the moving parts and careful balancing, this effect is much reduced. The use of gasoline as fuel, in connection with automatic burners, eliminates the smoke and ashes incident to the use of coal, and in addition reduces the labor of handling the vehicle, as no attention need be given to the mechanism other than to see that the water in the boiler is maintained at the proper level. In the case of the Serpollet carriages, not even this point need be looked after, as the feed of the boiler is perfectly automatic. SCIENTIFIC RESULTS OF THE NORWEGIAN POLAR EXPEDITION, 1893-1896.[O] BY GENERAL A. W. GREELY, U. S. ARMY. [O] The Norwegian North Polar Expedition, 1893-1896. Scientific Results edited by Fridtjof Nansen. Vol. I. Longmans, Green & Co. N. Y., 1900. 1-16, 3 pl. 1-147, 3 pl. 1-26, 2 pl. 1-53 pl. 1-137, 36 pl. Few Arctic expeditions have done so much to increase the world’s knowledge as to the physical condition of large areas of the north polar zone as has that of the _Fram_, initiated and commanded by Dr. Fridtjof Nansen. The expedition was unique in many respects. The _Fram_ was a departure from the accepted models of Arctic ships; the route followed was one unindorsed by any Arctic authority. The ship was destined to drift unprecedented distances, beset by the enormous ice-pack of the Arctic ocean. The commander himself was not only to attain the highest north, but was to make a most hazardous journey, which was to have a successful and unexpected issue partly through the aid of another polar expedition whose location and existence were unknown to the expeditionary forces of the _Fram_. Electricity made the Arctic ship a glow of light, a phonograph brought well-known voices to cheer their hours of leisure. Indeed, every device that was deemed of value was utilized. The extent of the Arctic ocean traversed by the _Fram_ is indicated by the simple fact that she passed over 120 degrees of longitude above the eightieth parallel of north latitude, a distance of one-third around the world on that parallel.