Nature

First State of the Union Address

A Short History of the Academy of Natural Sciences of Philadelphia

On poetic interpretation of nature

Natural History: Mollusca

Natural History: Fishes

Devils Tower National Monument

Birds of Song and Story

The Stewardship of the Soil

Tales of a Vanishing River

Mushroom and Toadstools

Elementary Botany

Two Ways of Becoming a Hunter

At the Sign of the Fox

The Catalpa Expedition

Oxford

Wood Wanderings

A Guide to the Virginia Springs

Friends and Foes in the Australian Bush

3000 Miles in the Great Smokies

Rambles in New Zealand