Environmental Protection

The Strangest Things in the World: A Book About Extraordinary Manifestations of Nature

Wilderness Honey

The apiary; or, bees, bee-hives, and bee culture

The Salton Sea: An account of Harriman's fight with the Colorado River

The Wanderings of an Elephant Hunter

Bee-Keeping

Forest, Lake and Prairie

Wild Earth

The book of earth

The Migration of North American Birds

Krag and Johnny Bear

Underground Treasures: How and Where to Find Them

The Encantadas

Letters from Australia

Wood Wanderings

A Short Account of the Botany of Poole

Masters of the Wilderness

From North Pole to Equator: Studies of Wild Life and Scenes in Many Lands

The Stewardship of the Soil

Tales of a Vanishing River