Feature

Studies on Mineral May Yield More Accurate Age of Earth

Dripless Pitchers Designed by German Engineers

Automatic Reaction Protected Body before Mind Developed

Nature Ramblings: Hell-Diver

Laughing Weakness Treated with Potent Chinese Drug

First Glances at New Books

Front Matter

Tides Yield Continuous Power in English Experimental Plant

Killing Kinsmen Possibly Practised in Mid-Europe

Scientist Studies Abandoned Mexican Cities on Cliff

Ordinary Decay of Teeth Is Controlled by Proper Diet

New Woods Sought for Lead-Pencils