Feature

New Projector Will Produce Eclipses of Sun on Demand

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

Irish Immigrants Becoming Emigrants

First Glances at New Books

Third Competitor Enters Race for Missing Element 87

Uncle Sam’s Coast Surveys Speeded up by Airplane

Coal Dust Explosions Drive Motor for Power Plants

Biting Birch Bark Designs Was Indians’ Lost Art

[Photograph]: Memorial to Columbus

Magnificent Orion

Nature Ramblings: Deep Sea Drama

Trees Will Die Unless Heavy Rains Fall