Nature

The Book of the Pearl

The Starlight Wonder Book

Language of Flowers

Cruisings in the Cascades

Little Wanderers

The Bee-Master of Warrilow

Karaway the Cockatoo and Other Nature Stories

Water and power for San Francisco from Hetch-Hetchy Valley in Yosemite National Park

Woodmyth & Fable

The Tropical World

The Geology of Mt. Mansfield State Forest

Proceedings of the fourth National Conservation Congress at Indianapolis, October 1–4, 1912

The Rambler club in the mountains

The Training of Wild Animals

Life at the Zoo: Notes and Traditions of the Regent's Park Gardens

The fauna of the deep sea

Texas Gemstones

The Andes and the Amazon; Or, Across the Continent of South America

Street Trees

Gray Lady and the Birds: Stories of the Bird Year for Home and School