Feature

High-Lift Airplane Lands on Short Runway

New Machines and Gadgets

Front Matter

Russia Has Minerals

Plastics Are Limited

Mysterious “Red Tide” Tracked by Postcards

Year’s First Comet Coming Closer to Us

New Flashing Star Seen

Need to Mine Coal Better

[Photograph]: Linear Accelerator

Colored Glasses Unsafe for Night Driving

New Rain Theory