Lunar Superstitions

The Problem of the Mutual Influence of Cathode Rays

The American Association for the Advancement of Science

The De Forest Wireless Tests Across the Irish Channel

The Orthodiagraph. An Apparatus for Determining the True Shape and Size of Internal Organs

By our Berlin correspondent

The Siemens & Halske New Electric Hand-Drill

The Pennsylvania Tunnel at New York City

The Barton 150-Horsepower Airship's Forth-Coming Trial Trip

By the London correspondent of the Scientific American

Remarkable Discoveries by Bandelier of Inca Civilization in Peru

A Harmless Reptile

Patent Department

Front Cylinder Head for Rock Drills

Oddities in Inventions

Business and Personal Wants