Feature

Nest Protection Aids Eider Ducks’ Return

Nature Ramblings: Spring Flowers Are Short

Special Microscope Mount Shows Growth of Cells

New Sweet Corn Variety Resistant to Ear Worms

Soil Moisture Measured by Electric Current

First Glances at New Books

Front Matter

Find “Extinct” Fish Alive in South African Waters

Earthquake History of U. S. Compiled by Coast Survey

WPA Built 154 Airports, Improved 494 Others

Confirm Release of Neutrons from Splitting Uranium Atoms

Fire Aloft May Be Conquered by Safe Fuel and New Engines