Feature

Planes and Tanks Have Made Heavy Artillery Obsolete

Millions of Kilowatt-Hours Saved from Engine Tests

Shortage of Physicists a National Emergency

Assembly Line Method Applied to Sun Bathing

Chemically “Toughened” Wool Is Developed

Avogadro Number Remeasured Differs from Textbook Value

New Machines and Gadgets

How Science Talent Winners Were Chosen Told by Judge

[Photograph]: Final Examination

Scholarship Winners Told Beware of Bumptious Vanity

Top Winners of Search Shown on Front Cover

Front Matter