Feature

[Photograph]: Arctic Oil

Rubber-Wrapped Eggs May Be Sold by the Yard

Teaching War Deaf and Blind

Hand-Pushed Weeder Invented for Gardens

Indium Used on Planes

Sunspot’s Appearance Ends 28-Day No-Spot Period

Two-Boat Transportation for Bulldozers Patented

War Photo-Mapping

Typhus Vaccine Reliable

Airplane Vapor Trails Formed by Condensation

[Photographs]: Not the Devil

[Photograph]: Giant “Spark Plug”