Feature

Cortisone Helps Hearts

Vacation Heart Care

Conveyor Belt Cartage

Age Tags Useless

Magnetic Switch Gives Fast Telephone Circuit Selection

Tube Unstops Intestines

X-Ray Sterilized Food Declared Dangerous

First Allergy Tests

Sewage “Farms” Yield Food

Few Large Sunspots Expected within Next Five Years

Quiet after Heart Attack

Front Matter