Freezing Tunnel on the Hagerman Pass, Colorado. (_Philadelphia Press_, October 16th, 1897.)--The Hagerman Pass Railroad line is said to have been abandoned after the completion of the Busk-Ivanhoe tunnel, but to have been rebuilt. The Hagerman tunnel for a distance of over 700 meters was filled with solid ice, and it required blasting with dynamite, and a month's continuous labor, day and night, to dig the ice out. Freezing Cavern in Cow Mountain, Colorado. (_Post Dispatch_, St. Louis, Mo., July 13th, 1897, and September 5th, 1897. _Mail Order Monthly_, St. Paul, Minn., October, 1899.)--The cave was discovered by parties doing assessment work on a group of claims. A man was picking in a three meter hole when he struck his pick into an opening, which was gradually enlarged and showed a deep pit underneath. The men got a rope and descended into an immense cavern full of ice. Later exploration led to a small hall, some 5 meters in diameter, full of icicles. From here a fissure led into a second rock chamber larger than the first. A small hole in the floor at an angle of some 45° gave access to a third and larger hall, about 25 meters by 40 meters. Great masses of ice were found in this, also a small lake, about 12 meters by 20 meters. "Some who have visited the wonderful discovery are of the opinion that it is a great cave or fissure in a glacier which for centuries has been slowly making its way down from Pike's Peak and whose waters are now feeding the Arkansas River." Windhole, Arizona. (_Christian Herald_, March 24th, 1897.)--Mr. Cofman, while drilling a well on his place, is said to have opened a windhole from which the escaping air current was strong enough to blow off the hats of the men who were recovering the lost drill. Some days the air escapes with such force that pebbles the size of peas are thrown up, accompanied by a sound much like the distant bellowing of a fog horn. Again for days there will be a suction current, unaccompanied by sound, in which the current of air passes into the earth with somewhat less force than when escaping, and any light object, as a feather or a piece of paper, will be immediately sucked in. The account is probably exaggerated. Freezing Lava Cave near Flagstaff, Arizona.--Professor W. B. Scott of Princeton University told me of this cave, which he had not visited himself. It lies 14.5 kilometers south of Flagstaff, on the Mesa table land, at an altitude of about 2000 meters. It was described to Professor Scott as a double cave, with two floors, one over the other, the lower containing the most ice. It is in lava, and can only be entered by crawling in on hands and knees.