Feature

Clean Disposal of Waste Provided by Food Grinder

Vitamin Is Old-Fashioned; New Names Should Be Used

Animal Charcoal Successful as Treatment for Infections

Engineer Sees Wider Use of Precious Metals in Industry

Finds Freak of Nature Awed Ancient People in Canyon

Mayan Indian God Found with Mother-of-Pearl Eyes

Strife of Fire and Ice Created Crater Lake

Vibration of Liners Being Studied in England

Distillery Produces “Dry Ice” from Waste Gases

First Glances at New Books

Front Matter

Infantile Paralysis Outbreak Will Test Value of Vaccine