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The Strength of Cast-Iron Pillars

Improved Mode of Lining Oil Barrels

Smithsonian Report

Recent American Patents

Foreign Correspondence

The Foot Lathe

Report of the Chief of the Bureau of Ordnance of the Navy Department

Separating Gold by Lead

Engineering Energy in America

To Whom It May Concern

The Rights of Joint Patentees

To Our Readers

Boiler Incrustations


End of the Volume

Preserving Timber

Patent Claims

Issued From the United States Patent-Office


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