Uncle Sam, Detective

Odd Jobs of Uncle Sam

Money

Our Bird Friends and Foes

Our Animal Friends and Foes

Uncle Sam's Modern Miracles: His Gigantic Tasks that Benefit Humanity

Uncle Sam, Wonder Worker: Being the Story of Strange Feats Performed by the Government in Its Work in Behalf of the Ninety Millions

Uncle Sam: Fighter

Uncle Sam, Detective

Hawaii and Its Race Problem

Conservation in the Department of the Interior

Conservation in the Department of the Interior: Volume 1