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Improved Portable Stump Extractor, The Chicago River Tunnel

Woodside's Patent Self-Setting Animal Trap

Manufacture of Cast Steel and Homonogeneous Iron

Special Correspondence of the Scientific American-Affairs at the Patent Office

Modern Penmanship

Telegraphing without Wires

The Bessemer Process How its Early Difficulties Were Overcome

Burying Alive-Experiments with Vester's Patent Burial Case

Manufacturing, Mining, and Railroad Items

Recent American and Foreign Patents

New Publications

Answers to Correspondents

A Blind Inventor

Stimson's Patent Butt Hinge Door Spring

Patent Torch for Lamp-Lighting


Nitrous Oxide as an Anesthetic

The Progress of Chemical Science

Small Potatoes

Improvement in Water Wheels

Official Report of Patent and Claims


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September 16, 1868

Of Shamrocks and Science

Happy St. Patrick’s Day