Scientific American Magazine
Volume 80, Issue 21You are currently logged out. Please sign in to download the issue PDF.
Features
The Forty-Foot Entrance to New York Harbor
The Mechanical Engineers and the Patent Office
How Our Art Manufactures May Affect Our Exports
A Question of Governmental Economics
Is Smokeless Powder Reliable?
The Bicycle Industry
Wireless Telegraphy
A New Gas-Generating Machine
The Chromo-Camera
Niagara as an Industrial Center
An Automatic Siphon
A Novel Portable Folding Boat
The Old Line-of-Battle Ship "Pennsylvania"
Animal Communities
The Radiophone at the Electrical Exhibition
The Efficiency of the Bicycle
An Improvement in Chemical Fire-Extinguishers
Departments
The Heavens in June 1899
Correspondence - May 27,1899
Notes and Queries - May 27,1899
New Books, Etc. - May 27,1899
Index of Inventions - May 27,1899
Recently Patented Inventions - May 27,1899
Business and Personal - May 27,1899
Patents - May 27,1899
