M. Curie's Experiments with Radium Emanations

Tropical Specialties for Porto Rico

The Exposition as an Educational Force

Osmon, a New Combustible from Peat

Phosphorescent Crystallization of Arsenious Acid

The Influence of Milking upon the Quantity and Quality of Milk

The Locomotive-Testing Plant at the World's Fair

The St. Louis Correspondent of the Scientific American

Counterweighted Cable Tramway

A Novel Wave Meter for Wireless Telegraphy

By Our Berlin Correspondent

A Handless Clock

Aeroplane Experiments

Trained Animals at the World's Fair

By the St. Louis Correspondent of the Scientific American

The Bee as an Artisan

Transportation Old and New

Business and Personal Wants