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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
Machine for Bending Printers' Leads and Rules
Gunmaking by Machinery
State Reports
Terra Cotta
Johnson's Renewable Tooth Comb
Moustache Guard
Wright's Bottle Stopper
The Planet Jupiter
The Quantitative Determination of Arsenic
John C. Draper
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
Hydrogen the Vapor of the Metal Hydrium
Mechanical Impossibilities - March 30, 1872
Another Big Patent Job before Congress
Recent American and Foreign Patents - March 30, 1872
