YELLOWSTONE NATIONAL PARK

Shows molten lava, obsidian cliffs, hot springs, mud volcanoes, and illustrates and explains action of geysers. Yellowstone Canyon, sectional contrasts with respect to climate, topography, people and population densities, are shown, also representative mining, lumbering and agricultural activities. "This series of contemporary life in the US is fairly good, but teachers will appreciate more scenery of the regions and less outline material." Collaborator