Ecology

The Open Window: Tales of the Months

The Lover's Baedeker and Guide to Arcady

The Ecosystemic Decision

Nature and Man

The Tropical World

Glaciers and Glaciation in Glacier National Park

Peter Parley's Wonders of the Earth, Sea, and Sky

Street Trees

Forest Trees and Forest Scenery

The Nature of Being Human

Two Years Among New Guinea Cannibals

Janet: A Stock-Farm Scout

Pictures of Travel

Shepherds of the Wild

The Book of Alfalfa

Happy: The life of a bee

On poetic interpretation of nature

Sphinx Vespiformis

Freckles from the Marvelous Forest

A New Subspecies of the Fruit-eating Bat, Sturnira ludovici, From Western Mexico