A Foolish Measure, New York Pier Problem Settled and more

Seeing Sound

Snap Shots of Waves Traveling at Seven Hundred and Fifty Miles Per Hour

The Slit Camera, Popular Ignorance About Our Common Woods and more

By Our Berlin Correspondent

The Art of Making Bronze Statues

From the Raw Clay to the Finished Figure

Parabolical Overhead Wiring for Electric Roads

A Comparison Microscope, The Mono-rail Sled and more

The Evolution of Worlds

The Work of Sir George Howard Darwin

A $100,000 Prize for a Gasoline Substitute

The Current Supplement