Feature

Made in America: Tularemia

Disease Fighters Gather to Fight Infantile Paralysis

“De-Silted” Water Endangers Power Plants

Develop Vaccine for Infantile Paralysis

Encke’s Comet Seen Again on Return Visit to Sun

Granite Changed to Sandstone and Shale

Earthquake Rocks Sea Floor in Caribbean

Nature Ramblings: Life at the Tips

Japanese Have New Means of Secret Radio Telephony

Double-Weight Neutrons Added to Units of Matter

Average Man May Need More than 3000 Calories

New Knowledge of Foods May Favor the Farmer