Feature

[Photograph]: Aerial Mapping with Five-Lens Camera

Need Good “Ear” to Play Fixed-Key Instruments

Ultraviolet Light Used in New Photographic Process

First Glances at New Books

Speedy Particles Released as Cosmic Rays Smash Atoms

Front Matter

Grand Stairway Unearthed in Ruins of Monte Alban

Gravity and Electricity Are Merged in New Mathematics

Soporific Drug Numbs Brain but Goes Chiefly to Muscles

Faint Nebulae May Be Most Distant Objects

Ball Lightning, Old Puzzle to Science, Made out of Smoke

Third Competitor Enters Race for Missing Element 87