Feature

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

Science Takes Measure of Roosevelt Vocabulary

Nature Ramblings: Monarda

First Glances at New Books

Front Matter

Madame Curie Pioneered in Field Now Very Fertile