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Better Concrete—I

Motion Picture Studies of Existing Conditions; Suggested Improvements

By Nathan C. Johnson

Is Alcohol Dead?

A Discussion of the Necessities and Possibilities of Greatly Increased Future Producing of Fuel Alcohol

By J. Paul Heritage

The Langmuir Postulates—II

An Introduction to Dr. Irving Langmuir's New Theory of the Constitution of Atoms and Molecules

By Ellwood Hendrick

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    October 25, 1919

    See the World from a Different Perspective

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