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

The Effect of Light on Mineral Oils

Explosive Compounds for Engineering Purposes

The Law of Steam

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

Self-Lubricating and Self-Clearing Drill

Koch's Combined Automatic Lifting Pump

Idiosyncracies

The Burden of Memory

Time as a Measure of Force

Steam Boiler Inspection and Insurance

Death of James Harper

New Publications

Answers to Correspondence

Are Utensils of Copper Injurious for Culinary Purposes?

Velocipede Notes

Recent American and Foreign Patents

Official List of Patents

Issued by the United States Patent Office

Patent Offices

European Patents