Feature

New Electric Roof of World Found by American Physicists

Big Tree of Tule Re-Examined; Claimed as World’s Greatest

Galileo on Falling Bodies: “A Classic of Science”

Front Matter

“Demon Frog” Brought to National Museum

X-Rays Show Changes under High Pressures

New Fossils May Represent Ancestors of Jellyfish

Hope for New Treatment of Addison’s Disease

Nature Ramblings: Breathing without Lungs

Six-Year-Old Children Have Brains of Adult Size

Vast Mayan Ruins Found by Briton

First Glances at New Books