Feature

Plants, like Steel, Require Many Chemicals

Teaching of Air and Marine Navigation Together Urged

Invisible Star Discovered by Photographic Means

Two New Insect-Fighting Chemicals Are Announced

For Speed in Learning Code, Cut out the Dots and Dashes

New Attack on Paralysis Promised by Experiments

Japanese “Book of Genesis” Basis of Claim to Supremacy

Talcum-Powder Operation Aids Heart Disease Victims

Haystack Chemical Remedy May Have Wide Usefulness

Nature Ramblings: New Insecticide

[Photograph]: Deadly

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