Nature

A Medley of Weather Lore

The Treasure of the Humble

Birds of the National Parks in Hawaii

Ferns of Hawaii National Park

The Land of Enchantment: From Pike's Peak to the Pacific

Birds in Legend, Fable and Folklore

Lassen Trails: A Brief Guide to the Trails of Lassen Volcanic National Park

Shaggycoat

The Underworld of Oregon Caves National Monument

Island Trail at Walnut Canyon. Walnut Canyon National Monument

The Spell of the White Sturgeon

The Boy With the U. S. Foresters

Geographic Variation in the North American Cyprinid Fish, Hybopsis gracilis

El Morro Trails: El Morro National Monument, New Mexico

The Lure of the Mississippi

Carlsbad Caverns National Park, New Mexico

Curious Facts in the History of Insects; Including Spiders and Scorpions

A Text-book of Entomology

The Botanical Lore of the California Indians with Side Lights on Historical Incidents in California

Cambrian Ocean World