During the excursion of the Seventh International Geological Congress to the Urals in the summer of 1897 the writer was enabled to make a number of observations on the stages of dissection reached in various parts of these mountains. Photographs were taken from m any summits and in various valleys and on grades of former river-courses, while sketches and profiles were made from these and many other points. Within the short limits of a month, however, only a very small area could be visited, even with the phenomenal facilities for travel in an undeveloped region given so freely by the Czar of Russia and all those who carried out his wishes; therefore the work done upon the dissection of this mountain region on the borders of Europe and Asia, and in the midst of a vast empire, can only be considered as a reconnaissance—a first attempt to . . .