Feature

New Machines and Gadgets

Nature Ramblings: Bright Invitations

Front Matter

Milky Way Larger

Thigh Shields Protect against Radiation

[Photograph]: Vibration Tests

Test Tells If Alcohol Breath Really Is Killed

Antivivisection Letters

Clock Ticks Twice a Year

Airplane Spray Kills Mesquite for More Beef

New Time Standard

New Chemistry-Geology Building in Los Angeles