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Experiments in Hybridizing Japanese Flowers

Which Appear to Show a Variation in Mendel's Law

By Walter Proctor Jenny

The X-Ray Spectrometer

A New Instrument for the Study of the Properties of Crystals

The Planet Jupiter

Possible Explanations of Some of Its Phenomena

By Theodore E. R. Phillips

The Physiology of Worry

By Erle D. Forrest

Organic Matter in the Soil

Storing Heat

A Russian Embargo on Woods

Peculiarities of Earthworms

Compound Forms That Are Hard to Explain

By E. Korschelt

Concrete Viaducts on the Pennsylvania Railroad

Replacing Insecure Wooden Trestles With a Substantial Road Bed

By Day Allen Willey

Actual Instances of Dual Personalities—II

Cases in Real Life That Rival the Wildest Fiction

By Edward Tyson Reichert

A New Recreation Region

Some Features of Photo-Chemistry

Are They the Results of Electrical Phenomena

By H. H. McHenry

Plant Only Certified Potatoes

Protecting Silvered Mirrors by Copper Plating


The Function of the Earth in Radio-Telegraphy

Concrete Wine Cellars

Preserving the Forests

Guide Lights on Aviation Fields

“Suction” between Passing Ships—I

Important But Little Understood Forces Affecting the Motion of Vessels

By A. Reeve


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