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Features

Excelsior Detaching Apparatus, Improved Cut-off Valve, and more

The Paris Exposition--As it Opened

Editorial Summary

Steam Boilers--Their Form, Construction, and Material

Science Familiarly Illustrated

Gleanings From the Polytechnic Association

Recent American and Foreign Patents

Answers to Correspondents

New Publications

Extension Notices

Eickemeyer's Improved Governor for Marine and Stationary Engines

Caution

The Sewing-Machine Manufacture--What it Has Accomplished

Mutual Assistance Among Mechanics

Meter and Testing Apparatus for Distilled Spirits

Improvement in Mechanics' Tools

Encouragement to Manufactures--The Newest Mode

Dogs Versus Wool

Business and Manufacturing Items

Estimating Guns in Horse-Power

Patent Claims

Issued from the U. S. Patent Office

How to Obtain Patents

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May 11, 1867

Think Outside the Gift Box