Nature

Letters from Australia

Wood Wanderings

Life Among the Butterflies

Friends and Foes in the Australian Bush

The Ornithosauria

A Short Account of the Botany of Poole

Masters of the Wilderness

On poetic interpretation of nature

Second State of the Union Address

Natural History of the Ground Squirrels of California

Natural History: Fishes

First State of the Union Address

CMH Publication #24–1Learning Lessons in the American Expeditionary Forces

A Short History of the Academy of Natural Sciences of Philadelphia

Natural History: Mollusca

Polar Exploration

Lectures on Landscape

Stars of the Desert

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

The Stewardship of the Soil