Feature

Spot Periodic Comet for Fourteenth Time

Bullet in Neck Starts Trouble 50 Years Later

Rest May Be Harmful

Why People Smoke

Atomic Radiation Checks Fungus Disease of Plants

Can Get Rh Blood Tolerance from Mother

Nature Ramblings: Swans

Dim View of Old Age

Plan New Radio Telescope

Standards Bureau Moves Radio Branch to Colorado

New Machines and Gadgets

Front Matter