Feature

Baku on Caspian Sea Now Has Science Academy

Books of the Week

Yellow Fever Found in Wild Animal in Brazil

New Machines and Gadgets

Front Matter

Cavities and Polio

Fly-Fouled Food Seen as One Way Polio May Spread

[Photograph]: Utility Power Boat

Epidemics Facing Europe

Supernova Discovered

Distillation Purifies Metals Easily and Safely

One-Handed Flying Is Now Made Possible