Volume 18, Issue 14
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Features
Davenport's Patent Low Water Alarm
Editorial Correspondence
Heat and Cold
Cole's Method of Raising Water
Compound Baths for Hardening Steel
Improved Device for Oiling Loose Pulleys and Gears
Manufacturing, Mining, and Railroad Items
Zwiebel's Improved Universal Joint
Answers to Correspondents
Recent American and Foreign Patents
The Distribution of Sodium in Nature and the Value of its Compounds as Manure
Explosive Oils--Kerosene and its Imitations-- Dangerous Compounds
Proposed Reduction of Patent Fees
The Blowpipe--Its Uses
Adhesion of Leather Belts to Cast Iron Pulleys
Platinum and Platinizing Metals
Patents and Claims
Issued by the United States Patent Office