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Features

Improved Baling Press, The Great Eastern--Her Repairs in New York--and the Ghost

Southern Opinion of Mechanics

Miscellaneous Summary

Report of the Chief of the Bureau of Ordnance

A New Rebel Torpedo

Armor Plates for Ships of War

Practice at Mr. Hodge's Wire Target No. 1

Day's Kerosene Lamp

Economy of Fuel--Smelting Iron

Self-Stopping Gear for Tools

Our New Dress

Condensing and High-Pressure Engines

Use Patented Articles

Nitrous Oxide as an Anesthetic

Water Wheels in the Kitchen

Why Are the Monitors Idle?

The Machinists Strike

Lubricating Crank Pins

Lecture on the Iron-Clads

Patent Claims

Issued from the United States Patent-Office

Recent American Patents

To Our Readers

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December 19, 1863

Beyond XX and XY

Beyond XX and XY

Biology. Identity. Equality.