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Beer-Making 8,000 Years Ago

Students Influenced by What “Everybody Thinks”

Prehistoric Iroquois Camp Explored by Scientists

Delicate Cellulose Destroyed by Wood Pulping Methods

Front Matter

Largest Wind Tunnel and Towing Channel Finished

Rumford Medal Awarded Dr. Karl T. Compton

Research Shows Diet Is Not Responsible for Cancer

Height of Northern Lights Measured by Photographs

No Need for Alarm over Seventeen-Year “Locust”

Tooth Enamel Consists of Apatite Crystals

Hundred per Cent Efficient Light Produced in Laboratory