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Features

Improved Brick Machine

Lunar Assistance

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

Ladenberger's Patent Wagon Brake

Tamkin's Automatic Heat Damper

Prof. Doremus on the Creation

Ice Machines

The Best Modes of Testing the Power and Economy of Steam Engines

By Charles E. Emery

Editorial Summary

Manufacturing, Mining, and Railroad Items

Answers to Correspondents

Recent American and Foreign Patents

Removal of the Broadway Bridge

A National Invention Bureau

Poisonous Drugs and Cosmetics

Our State Canals--Engineering Suggestions

Facilities for International Communications

A Hint to Our Inventors

Annual Rainfall in Different Portions of the Earth

How to have a Cheap Hot Dinner

Patents and Claims

Patent Offices

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November 25, 1868

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