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Leaded Gasoline Renamed to Insure Safety

Actual Rubber Shortage Seen for 1930

Home Grown Rubber Tried out by Government Experts

No Effort at All for Chick to Walk

Supercharger to Change Auto Engine Design

Warns Printers Against Lead

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Tetraethyl Lead Gas Found Not Dangerous

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Ten Years Knocking the Knock from American “Gas”

Can We Predict Earthquakes?

Science Defensive Checks Corn Foe