EvolutionDecember 25, 1915
A Government Fossil Tract in Utah
Stories by Arthur Chapman
Space & PhysicsJanuary 16, 1915
A Mine in a Meteor-Made Crater
Work of a 15,000-Centimeter Celestial Projectile
A Government Fossil Tract in Utah
A Mine in a Meteor-Made Crater
Work of a 15,000-Centimeter Celestial Projectile