Feature

Rat “Digests” Quarter of a Steel Ball Bearing

Nature Ramblings: Always Four-Leaved

“Fossil Niagaras” Dwarf Earth’s Greatest Waterfalls

First Glances at New Books

Study Throws New Light on Tooth Decay

Front Matter

Only Half of Lightning Flash Is Seen by Observers

Scientists to Study Expected Radio Eclipse

New Features Built into Next Navy Airship, “Macon”

Black Magic of Witchcraft Reappears in England

Changing Constellations and Meteors Featured in Skies

Scientists Begin Occupying Stations for Polar Year Work