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Graduated Amplifiers for Hard of Hearing

Organization to Study Tropic Plants

New Sounding Method Improved by Coast Survey

Drug Addicts Fewer Federal Report Says

Tidal Motor Made by Bulgarian

Simple Science by Wow: Bread

Bobbed Hair Threat to Hairpin Industry

Ploughing Made Easier by Electrical Device

Doctors Doubtful of Cancer Serum

New Locomotives Make Pygmies of the Old

Spots on Venus Arouse Interest of Astronomers

Science Did Not Inspire Chicago Muderr, University Records Show