Scientific American Magazine
Volume 20, Issue 9You are currently logged out. Please sign in to download the issue PDF.
Features
Improvement in Separating and Concentrating Ores, Grains, Etc.
Is Hydrogen Gas a Metal?
“Modern Engineering”—By the Hon. Wm. J. Mcalpine
Editorial Summary
Velocipede Notes
Webb's Patent Adder and Tally Board
Greene's Portable Engine, Union Check Valve, and Lubricator
“Waste” and “Economy” of Fuel
Examination of Applications for Patents—The Two Systems Compared
The Wickedness of Waste.—Value of Bones
Hollow vs. Solid Shafting
Importance of Accuracy in the Use of Mechanical and Scientific Terms
Vegetable Oils Used in Painting
Land and Water—Are Earthquakes Land Makers?
Conserving of Fruit
Bulletin of the National Association of Wool Manufacturers
Recent American and Foreign Patents
The Gard Brick Machine
New Publications
Manufacturing, Mining, and Railroad Items
Official List of Patents
Answers to Correspondents
European Patents
Patent Offices
Departments
Correspondence
Business and Personal
