DEVILS POSTPILE NATIONAL MONUMENT. One of the world's finest examples of the volcanic rock known as basalt, this was part of 500 square miles removed from Yosemite National Park in 1906 through the influence of commercial interests. Later, when District Forest Service Engineer Walter Huber received an application for permission to blast the Postpile into the San Joaquin River to dam it for mining operations, his opposition led to the establishment, by President Taft, of the Devils Postpile National Monument. Thus this rare formation was given Federal protection. (Photograph by Ralph H. Anderson.)