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Ancient Flint Implements

Bread Fruit and its Possible Uses

A Novel Cure for Frozen Plants

Sugarless Candy

The Artistic Possibilities of Concrete

Some Reforms in the Patent System

An Important Institution Which Should Be In A Continual State of Evolution

By F. W. H. Clay

Motor Fishing Vessels use of Oil Engines

A Compound Harmonic Motion Machine—I

Adapted For Drawing Any Predetermined Curve with Mathematical Accuracy

By William F. Rigge

Effects of Hearing versus Seeing

By William J. Dana

Decolorizing Carbon

The Geologic Role of Phosphorus

Study of A Minute Problem in its Larger Relations

By Eliot Blackwelder

After-Ripening of Sugar Cane

How Long Would it Take a Stone to Fall to the Center of the Earth?


  • Direct Selection in Pure Lines

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February 09, 1918

Confronting Common Wisdom