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Features

Davenport's Patent Low Water Alarm

Improvement in Corn-Shelling Machines, Iron and Chromium and Chromium Steel

Editorial Correspondence

Heat and Cold

By John Tyndall

Cole's Method of Raising Water

Compound Baths for Hardening Steel

Improved Device for Oiling Loose Pulleys and Gears

Zwiebel's Improved Universal Joint

Manufacturing, Mining, and Railroad Items

Answers to Correspondents

Recent American and Foreign Patents

Explosive Oils--Kerosene and its Imitations-- Dangerous Compounds

The Distribution of Sodium in Nature and the Value of its Compounds as Manure

The Blowpipe--Its Uses

Proposed Reduction of Patent Fees

Adhesion of Leather Belts to Cast Iron Pulleys

Platinum and Platinizing Metals

Patents and Claims

Issued by the United States Patent Office

1868 Scientific American the Best Paper in the World

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April 04, 1868

Think Outside the Gift Box