Volume 90, Issue 3
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Features
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 Siemens & Halske New Electric Hand-Drill
The Orthodiagraph. An Apparatus for Determining the True Shape and Size of Internal Organs
By our Berlin correspondent
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
Oddities in Inventions
Patent Department
Front Cylinder Head for Rock Drills