Volume 19, Issue 2
You are currently logged out. Please sign in to download the issue PDF.
Features
What is Planchette ?
The Impossible in Constructive Science
Editorial Summary
Decision in a Reissue Case
Recent American and Foreign Patents
Manufacturing, Mining, and Railroad Items
Extension Notices
New Publications
Answers to Correspondents
Water Blowing Through Engine Cylinders
Casks
Abuse of the Franking Privilege
Effect of Labor-Saving Machinery Upon Wages
Quality of Musical Sounds
Modern Telegraphy
Importance of Regular Habits
The Sutro Tunnel
Recent Boiler Explosions
Patents and Claims
Issued by the United States Patent Office