The Gulch lies between Crescent and Black Mountains. The altitude of the upper end of the Gulch is something over eight hundred meters, that of the lower end about six hundred meters. It is some fifteen hundred meters long, and averages perhaps one hundred meters in width at the top, and only a few meters at the bottom. The depth may be about seventy-five meters and the sides are steep, in some places sheer. The bottom is a mass of broken, fallen rocks, with a good many trees growing among them. There are several steps, so to speak, in the Gulch, which are called chambers, although the term seems rather meaningless. Promenading through the bottom of the Gulch was fraught with difficulty, because the rocks were placed in most unsuitable positions for human progression, and my hands were certainly as useful to me as my feet in preserving equilibrium. We found ice in one or two places, but not in any great quantity. In one spot it was overlaid by water. My guide said that there was less ice than the year before. A large piece which we broke off, and which furnished us with a cooling morsel of frozen fluid, was full of air bubbles. It was not prismatic ice, and was certainly unusual in formation. It crunched up under the teeth and, although it did not look like solidified snow, yet, judging from its position among the boulders, it was doubtless formed from the melting and refreezing of snow.[9] My guide said he had heard that fresh ice began to form sometimes in September. The Gulch is well protected against wind, and I detected no draughts among the rocks. Except in the immediate vicinity of the ice, the temperature was not abnormally low. [9] On the 17th of February, 1899, four days after the greatest snow storm in Philadelphia in many years, I noticed that the snow on my roof solidified slowly into a mass of ice which contained a good many air-bubbles. It strikingly resembled the ice of the Ice Gulch, only that it was more solid and did not have more than half as many air-bubbles. On returning to the Mount Crescent House, I had a talk with Mr. Charles E. Lowe, Sr., who told me that Alpine plants, like those which grow on Mount Washington and Mount Adams, are found in the Gulch; but that they do not exist on the neighboring Black and Crescent Mountains. He said also that ice was present in more than one place in King's Ravine, and that it was always there. FREEZING BOULDER TALUS AT RUMNEY.