themselves--therefore, tears off their wings before they leave the cone. The battle for existence begins before the seeds germinate, and the struggle never ceases. The tree, in parts of its range, survives a temperature sixty degrees below zero. Its seedlings frequently perish, not from cold and drought, but because the wind thrashes them against the rocks which wear them to pieces. Trees which survive on the great heights are apt to assume strange and fantastic forms, with less resemblance to trees than to great, green spiders sprawling over the rocks. Trees 500 years old may not be five feet high. Deep snows hold them flat to the rocks so much of the time that the limbs cannot lift themselves during the few summer days, but grow like vines. The growth is so exceedingly slow that the new wood on the tips of twigs at the end of summer is a mere point of yellow. John Muir, with a magnifying glass, counted seventy-five annual rings in a twig one-eighth of an inch in diameter. Trunks three and one-half inches in diameter may be 225 years old; one of six inches had 426 rings; while a seventeen-inch trunk was 800 years old, and less than six feet high. Such a tree has a spread of branches thirty or forty feet across. They lie flat on the ground. Wild sheep, deer, bear, and other wild animals know how to shelter themselves beneath the prostrate branches by creeping under; and travelers, overtaken by storms, sometimes do the same; or in good weather the sheepherder or the hunter may spread his blankets on the mass of limbs, boughs, and needles, and spend a comfortable night on a springy couch--actually sleeping in a tree top within two feet of the ground. In regions lower down, the whitebark pine reaches respectable tree form. Fence posts are sometimes cut from it in the Mono basin, east of the Sierra Nevada mountains. In the Nez Perce National Forest trees forty feet high have merchantable lengths of twenty-four feet. Similar growth is found in other regions. In its best growth, the wood of whitebark pine resembles that of white pine. It is light, of about the same strength as white pine, but more brittle. The annual rings are very narrow; the small resin passages are numerous. The sapwood is very thin and is nearly white. Men can never greatly assist or hinder this tree. It will continue to occupy heights and elevated valleys.