Essays

The Dolphin in History

Portland, Oregon, A.D. 1999, and other sketches

XXXII Ballades in Blue China

The Age of Pope (1700–1744)

A Book of Golden Deeds

Schools of to-morrow

The World of Flying Saucers: A Scientific Examination of a Major Myth of the Space Age

The Complete Works of Benjamin Franklin

Prairie, Peak, and Plateau: A Guide to the Geology of Colorado

The Book of Christmas

Balthasar and Other Works – 1909

To the American Indian

Conspecificity of two pocket mice, Perognathus goldmani and P. artus

Fatigue Study: The Elimination of Humanity's Greatest Unnecessary Waste

A History of Economic Doctrines from the time of the physiocrats to the present day

International Law

The Spirit of America

Wasps, Social and Solitary

The Man Farthest Down: A Record of Observation and Study in Europe

Dead As Doornails