Mr. Howell went to this talus, on the 4th of July previous, with Mr. Niles, President of the Appalachian Mountain Club, on which occasion they found plenty of snow near the entrance of the larger hollow. Mr. Howell, indeed, has repeatedly visited this place, and always found ice, which must, therefore, be looked on as perennial. At all times also he has felt cold draughts flowing out; sometimes they were so strong as to lower the temperature over the lake to a distance of thirty meters or more: on hot days he has seen occasionally a misty cloud form on the lake in front of the boulders. Mr. Howell considers that the draughts so affect the surrounding air, that an artificial climate is produced, and it is owing to this that spring flowers bloom late in July and sometimes in August. Another fact well known to him, is that in hot weather, the spot in front of the boulders is the best in the whole lake to catch trout, as they always congregate in the coldest water. The Adirondack guides use these ice retaining hollows, which they call ice-caves, as refrigerators for their provisions and game in hot weather: they say that the ice is formed in winter and remains over during the summer, as it is so well sheltered. FREEZING TALUS OF THE GIANT OF THE VALLEY. On the indications of Mr. Otis, chief guide of the Adirondack Reserve, I explored with Mr. C. Lamb, a guide from Keene Valley, the southern base of the Giant of the Valley Mountain, Essex County, New York, on the 14th of July, 1898. A road runs from Keene Heights to Port Henry, through the gap between the south base of the Giant of the Valley and the north base of Round Mountain, and passes close to a small lake called Chapel Pond. Some three hundred meters west of this lake, we left the road and struck north, across the brook, into the thick, mossy woods. After perhaps one hundred meters, we came to a talus of great boulders of Laurentian rock, with the cliffs of the Giant, whence the boulders had fallen, rising steeply above. We found ice under several of them, although never in any quantity. The thermometer, after an exposure of fifteen minutes in one of these little hollows, registered 6° C., although not more than one meter from where the sunshine fell on the moss. In the shade of a tree one meter distant from the same hollow it registered 26° C.; a difference of 20° C. at a distance of only two meters.