Feature

Nature Ramblings: Tree Preparedness

Airplane Passengers See Their Own Plane in Flight

Front Matter

Present War May Bring Conquest of Influenza

[Photograph]: Most Unconventional

500 M.P.H. Airplane Wing Forecast in Research Tests

Thermal Pump Uses Heat Not Mechanical Energy

Spiders Help Fight the War; Their Webs Make Cross-Hairs

Quiet Hunt Begun in U. S. for Emergency Mines

Sulfapyridine Helps Baby Recover from Influenza

German Economist Credits Britain with Great Strength

Japan Plans Program of Synthetic Rubber Making