Scientific American Magazine
Volume 68, Issue 20You are currently logged out. Please sign in to download the issue PDF.
Features
The Broadway Cable Railway, New York
One Hundred and Twelve and One Half Miles Per Hour
The Electric Railway Trolley
Prices at the World's Columbian Exposition
The Crossing of Rivers by Means of Leathern Bottles
The World's Columbian Exposition-- the Pope's Phonographic Message to America
A Measuring and Drawing Tool
A Viking Ship
Simple Hygroscope
An Improved Calking Tool
The Trumpeters
To Inventors - May 20, 1893
Departments
Correspondence - May 20, 1893
Recently Patented Inventions - May 20, 1893
Notes and Queries - May 20, 1893
Business and Personal - May 20, 1893
Index of Inventions - May 20, 1893
New Books and Publications - May 20, 1893
Patents - May 20, 1893
