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Features

Method of Raising Ice, Method of Utilizing Heat in Steam Boilers, and more

Editorial Correspondence

Transmission of Water Power for Long Distances

Dutton and Maguire's Pump Tube

Manufacture of Magnesium and Sodium

Another Petroleum Disaster. Danger of Transporting Crude Petroleum

Clark's Combined Boiler Bolt and Ferrule

Editorial Summary

Manufacturing, Mining, and Railroad Items

Answers to Correspondents

Recent American and Foreign Patents

Davey's Steam Trap

Villard's Crucible Tongs

Kochensperger's Brake Holder

Dangers of the Gas Made from the Volatile Constituents of Petroleum

A Uniform System of Coinage and the Proper Ratio of Values

The Cost of Artificial Light

The Metric System as a Branch of Education

The Duty of Usefulness--A Business for Every Man

Patents and Claims

Transplanting Trees--The Best Time and Way

Trial of Steam Fire Engines

The Metal Nickel--Its Use in Coinage

Poisonous Character of So-Called “California Rosewood”

Patent Office Decisions

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August 17, 1867