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Derrick for Loading Hay, An Ice Factory, and more

Patents and Monopolies

Report of the Smithsonian Institution

Tin--How Sampled, Assayed and Smelted

Recent English Patents

How to Set a Slide Valve

Toggle Joints as Power

Fictitious Amethysts

What Came of it

Steam Jets in Fires Lengthening the Flame

Work and Power

The Law of Patents

The Sky Now

Launch of the Dunderberg

Special Notices

Patent Claims

Issued from the United States Patent-Office

Recent American Patents

Corbin's Bag Holder

Patent Agency Office


  • Departments


  • Notes and Queries

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