Scientific American Magazine
Volume 90, Issue 20You are currently logged out. Please sign in to download the issue PDF.
Features
Our Available Iron-Ore Supply
On Some Novel N-Ray Phenomena
Electric Traction Tests at the Worlds Fair
New System of Tunnel Construction
Turbine Ocean Steamers
Induced Radio-Activity and Aluminium
New Method of Inflating Balloons in War Time
Automatic Match Lighter Operated by Alarm Clock
The Challenging Yacht "Ingomar"
An Improved Michaud Apparatus
The Torpedo Boat in Modern Warfare
Ruins of the Ancient Inca Empire
The Small Arms of the Russian and Japanese Armies
New York's Spring Automobile Parade
Business and Personal Wants
Departments
Correspondence - May 14, 1904
Recently Patented Inventions - May 14, 1904
Index of Inventions - May 14, 1904
Notes and Queries - May 14, 1904
Patents - May 14, 1904
