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Features

Improved and Simplified Band Saw, Plan for Converting Reciprocating into Rotary Motion, and more

Expansion and Contraction of Steel

The Copper Region of Lake Superior

Clemson's Adjustable Spring-Held Saw Teeth

Coating Iron with Copper

The Chemistry of Meteorites

House's Improvement in Trunks

Editorial Summary

Manufacturing, Mining, and Railroad Items

The November Meteors

Recent American and Foreign Patents

Extension Notices

New Publications

Answers to Correspondents

Hoffmann's Improvement in Lamps

Hand-Tooling--Its Advantages to the Machinist

The Petroleum Fuel--Will it Supersede Coal?

Economy in Coke Making--The Utilization of the Waste Gases

Anti-Friction Metal for Railway Axles

Official Report of Patents and Claims

Pending Applications for Reissues

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November 30, 1867

Beyond XX and XY

Biology. Identity. Equality.