Feature

Gases Heavier than Lead

German Acid Treatment Improves Cotton Cloth

Sensitive Mechanism Operates with Superhuman Accuracy

Sees Future Factories Growing Own Fuel

Drowning out Rice-Field Weeds

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New Instrument May Locate Old Tombs

Cost of Inherited Blindness High

Bath for Seeds Speeds up Growth

Will Urge Faster Mapping of World

Dull Workers Best on Boresome Job

August Brings Many Meteors