The cohesive character of moist snow, which is utilized by the younger generation in the making of snowballs and snow men, enables this substance to assume naturally a variety of striking forms. Thus a strip of snow lying along a window ledge or the branch of a tree, will sometimes slip down in the middle and hang in festoon-shape, supported only at the ends, constituting a “snow garland.” Over a level or gently sloping surface of snow the wind occasionally rolls muff-shaped snowballs, which are known as “snow rollers.” Thousands of them are sometimes formed at once, and the largest may grow to the size of barrels. Huge overhanging caps of snow formed on tree stumps, posts, and the like have been aptly named “snow mushrooms” by Mr. Vaughan Cornish, who has described those that occur in great numbers in the Selkirk Mountains of western Canada. [Illustration: AN ICE STORM AT PHILADELPHIA, DECEMBER, 1914. The branches are broken by heavy deposits of glaze. The photograph in the upper left corner, by Dr. David Fairchild, shows a glaze-incased twig. (_Photographs from U. S. Weather Bureau._)] Perhaps the strangest of all the shapes assumed by snow is seen in the greatest perfection in the high Andes of tropical Argentina and Chile. Here are found innumerable pinnacles of snow or glacier ice, averaging from four to seven feet in height, though sometimes much higher. Viewed from a distance, they bear an uncanny resemblance to throngs of white-robed human beings, and they have thus acquired the Spanish name of _nieve de los penitentes_ (“snow of the penitents”). In the abridged form _nieve penitente_ this name is now applied to more or less similar formations in other mountainous regions. Fine examples are found in the Himalaya, and one of the Himalayan peaks has been named Mount Nieves Penitentes. The origin of these pinnacles has been the subject of much discussion. Sunshine and wind both appear to take part in their formation. Some remarkable “snow honeycombs,” approaching the form of _nieve penitente_, are produced in hot, dry summer weather among the glacier fields of Mount Rainier. [Illustration: THE NIEVE PENITENTE IN THE ARGENTINE ANDES (_Photograph by Dr. Juan Keidel._)]