Feature

Gravity Value Determined at Bureau of Standards

Relativity and Quantum Theories Are Harmonized

Nature Ramblings: Wildfowl of Your Own

All-Wavelength Broadcast to Probe Earth’s Ionosphere

Find That Mosquitoes Winter in Twilight Caves

Foolproof Hood Saves Welder’s Eyes

[Photograph]: Dr. W. M. Stanley. Dr. Forest R. Moulton

Out of the White

Chemical Cure for Cancer Is Only a Matter of Time

Front Matter

Ancestry of the Alphabet Traced to New Source

First Glances at New Books