Features
Machine for Testing the Strength of Metals, Wire, Rope, Chain, Cast Iron Columns, Bridge Bolts, and Boiler Plates, Junction of the Black and Caspian Seas and more
State Reports
Gunmaking by Machinery
Terra Cotta
Moustache Guard
Johnson's Renewable Tooth Comb
The Planet Jupiter
The Quantitative Determination of Arsenic
Wright's Bottle Stopper
Geological Report for New Jersey
Scientific and Practical Information
Melendy's Door Fastener
Beach's Spiral Spring Scroll Sawing Machine
Making Organic Substances from their Inorganic Elements
The Relations of Art to Industry and Museums of the Arts of Design
Mechanical Impossibilities - March 30, 1872
Hydrogen the Vapor of the Metal Hydrium
Another Big Patent Job before Congress
Recent American and Foreign Patents - March 30, 1872
Departments
- From the Editor
Answer to Correspondents - March 30, 1872
- Letters
Correspondence - March 30, 1872
- Recommended
New Books and Publications - March 30, 1872
- Departments
Business and Personal - March 30, 1872
Notes and Queries - March 30, 1872
Index of Inventions - March 30, 1872
