Features
Bells and Bell Towers
Mineral Deposits
An Interesting Sketch of the Distinguished Aeronaut, John La Mountain
Hamilton's Water Elevator
Denn's Improved Gridiron and Cake Baker
Hill's Locking Whip Socket
The Bessemer Process Under Pressure
The Bitricycle, a French Invention
Galmann and Ruhe's Improved Joist Protector
Obituary--Seth Boyden
Glazed Bricks for Building Purposes
Nature's Elevator
The Measurement of Water Power
Dualin--What is Claimed for It
Michael Faraday
Patent Office Decisions- April 9, 1870
Recent American and Foreign Patents- April 9, 1870
H. S. Patent Office- April 9, 1870
Answers to Correspondents- April 9, 1870
Applications for Extension of Patents- April 9, 1870
Official List of Patents- April 9, 1870
Departments
- Letters
Correspondence- April 9, 1870
- Departments
Business and Personal- April 9, 1870
