Feature

Unknown Interior of Earth Invites Future Explorers

Dry Ice Strengthens Ice Box against Electric Refrigerator

[Photograph]: House for Infants Only

Mud-Dauber Wasp Pioneer among Masons

Nature Ramblings: Irreversible Evolution

Cannibalism Everyday Habit of Ancient Wisconsin Indians

Front Matter

Unpredicted Meteor Shower Surprises Astronomers

New Parachute Device Adopted by Navy

Radium “Seeds” Planted to Fight Cancer at Close Quarters

Six Million Children without Enough to Eat

400,000 Yards of Concrete in Feet of Boulder Dam