Feature

Radioactive Iron Atoms Give New Way to Diagnose Anemia

Castor Oil, Coal Newest “Silkworms” for Stockings

Compressed Air Harpoon Helps Keep Whale Afloat

Front Matter

Condemns “Despotism” in “Time Capsule” Message

Proposes Limit to Distance for Radio Remote Control

Soap Bubbles Aid Explosion Studies

Four-at-Time Iron Lung Saves Expense; Now in Use

Ancient American Wonder Gains Tourist Fame

Valley of Dead Sea Was Pushed Down

First Glances at New Books

Racing Sailboats Fitted with Streamlined Rod Rigging