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Features
Improved Brick Machine
Observations on the Gold Fields of Venezuela and Geology of the State of Guayana, Read before the Lyceum of Natural History of N. Y.. by R. P. Stevens, Nov. 2D, 1868
Lunar Assistance
Ladenberger's Patent Wagon Brake
Prof. Doremus on the Creation
Tamkin's Automatic Heat Damper
Ice Machines
The Best Modes of Testing the Power and Economy of Steam Engines
Charles E. Emery
Editorial Summary
Manufacturing, Mining, and Railroad Items
Answers to Correspondents
Recent American and Foreign Patents
Removal of the Broadway Bridge
Our State Canals--Engineering Suggestions
Facilities for International Communications
A National Invention Bureau
Poisonous Drugs and Cosmetics
Annual Rainfall in Different Portions of the Earth
