Features
The New Commissioner of Patents
Amendments to the Copyright Law
Relation of the Government to the Patents of Naval Officers
A Bill to Protect Inventors
A New Discovery in Physics
Usefulness of the Simplon Tunnel
Gems of Quartz Origin
Automatic Slack Adjuster for Car Brakes
An Efficient Woodworking Machine
An Improved Die Head
Ney's Pocket Field Glass
The United States First-Class Sea-Going Battleship Iowa
A Toy Phonograph
Chilton's Safety Pin
The Field Columbian Museum, Chicago
A Velocipede Shower Bath
Departments
- Letters
Correspondence - April 10, 1897
- Departments
New Books, Etc - April 10, 1897
Business and Personal - April 10, 1897
Notes and Queries - April 10, 1897
Recently Patented Inventions - April 10, 1897
Index of Inventions - April 10, 1897
