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Improved Woodworth Planing Machine, Machine for Digging Potatoes, and more

Explosive Compounds for Engineering Purposes

The Effect of Light on Mineral Oils

The Law of Steam

By Julien M. Deby

The Sewing Machine—Its Origin and Suggestions for Improvement

Beet Root Sugar in the United States

Shafting, Pulleys, and Belts

Paige's Patent Improvement in Steam Boiler Furnaces

Koch's Combined Automatic Lifting Pump

Self-Lubricating and Self-Clearing Drill

The Burden of Memory


Time as a Measure of Force

Steam Boiler Inspection and Insurance

Death of James Harper

Velocipede Notes

Answers to Correspondence

Are Utensils of Copper Injurious for Culinary Purposes?

New Publications

Official List of Patents

Issued by the United States Patent Office

Recent American and Foreign Patents

European Patents

Patent Offices


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