Volume 18, Issue 21
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Features
Elegance of Design an Element of Utility in Machinery
Johnson's Self-Fastening Button
Riordan's Clothes Line Holder
On the Strength of Boilers
“The Wheel”
Editorial Summary
Recent American and Foreign Patents
New Publications
Extension Notices
Answers to Correspondents
Docks and Wet Basins for East River, New York
Lectures on the Animal Kingdom
Transmission of Power by Hydrostatic Pressure
Hydrocarbons--Their Inflammability and Explosiveness
Judge Fisher on Reissues, Suspension of a Good Rule
Foreign Matters Imbedded in Growing Timber
Patents and Claims
Issued by the United States Patent Office