Feature

Heavy Artillery Aided by New Electronic Equipment

Clinics Needed

Tablet Manganese Prepared with No Melting Necessary

Invention Opportunities

Front Matter

“Impossible” Hybrids

Books of the Week

Short Food Rations

Railroad Gas Turbines

[Photograph]: Outdoor Spotwelding

Chemical Method for De-Salting Sea Water

Device Helps to Locate Defective Insulation