Air Control Solves Tube Problem

Green Dragon Of The Tropics

Banana Fungus, Picturesquely Named by Natives, Threatened Extinction of Industry, Menace Averted, Enormous Cost, Ingenuity Involved

More Miles Per Gallon

Fuel of the Future, Car of Future Designed For It, Both Will Come Through Co-Operative Research, Future Presaged by Past Progress

What Does the Soil Need?

Scientific Fertilizing Produces Remarkable Results, Possible When Soil Minerals, Soil Needs Are Known, Proper Tests Give Answer To Grower

Stars That Have Chemistries

Certain Classes of Stars Have Atmospheres Like the Familiar Oxidizing and Reducing Atmospheres of the Chemical Laboratory

Man's Earthly Future

How Long Will Our Earth Survive, and How Long Will the Species Called Man Endure on It? Man's Fate: Either Oblivion or Improvement

When Water Shortage Threatens

Lessons Learned by New York City, Prolonged Wet Spells Give False Sense of Security, How Wastage May be Decreased to Conserve Supply

Soundless Sound Waves

Supersonic Waves in Science and Industry, For Smoke Precipitation, Emulsification of Liquids, in Fishing and in War, Sounds that Burn

Railroads in the Cellar

Capitalization of Model Railroads Now Runs Into Many Millions, Serious Avocation, Men Form Exclusive Clubs, Run Trains Like Railroaders

Food by Vein

Hospitals are Beginning to Use the New Method of Supplying Food to Those Who Cannot Eat. The Expectations are Auspicious