Merriam's mapping of life zones in the San Francisco Peaks area is documented by journal entries from the fall of 1899. Illus. Ports

Discussion and evaluation of Merriam's Life Zone concept which was concerned with mapping the various life zones as defined by major plant species. Drawing showing his zones. Photos of vegetation

In an issue entirely devoted to Merriam and his accomplishments, this is a detailed biographical sketch. Illus. Ports