The floor of my snow-chamber was the surface of the old snow on which we had pitched our tents at the time we first reached that camping place. On this hard surface, and forming the walls of the cell, there were thirty inches of clear white snow, the upper limit of which was marked by a blue layer of ice about a quarter of an inch thick. This indicated the thickness of snow that fell during the first storm. Its surface had been melted and softened during the days of sunshine that followed its fall, and had frozen into clear ice. Above the blue band which encircled the upper portion of my chamber was the soft, pure white snow of the second storm. The stratification of snow which I had seen fall rendered it evident that my interpretation of the stratification observed in the sides of crevasses was correct. The snow when it fell was soft and white, and composed of very fine crystals; but under the influence of the air and sunshine it changed its texture and became icy and granular, and then resembled the névé snow so common in high mountains. {157} The day following the storm was bright and beautiful; the sunlight was warm and pleasant, but the temperature in the shadows was always below freezing. The surface of the snow did not melt sufficiently during the day to freeze and form a crust during the night. It thus became more and more apparent that the season was too far advanced to allow the snow to harden sufficiently for us to be able to climb the mountain. The snow settled somewhat and changed its character, but even at midday the crystals on the surface glittered as brilliantly in the sunlight as they did in the early morning. Although the snow did not melt, its surface was lowered slightly by evaporation. The tracks of the raven, at first sunken a quarter of an inch in the soft surface, after the first day of sunshine stood slightly in relief, but were still clearly defined. * * * * *