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Improved “Dead-Center Lift”

Report of the Chief of the Bureau of Ordnance

The Plants and Animals of the Petroleum Rocks

Punched and Drilled Holes in Plates

Turning Tools

Polytechnic Association of the American Institute

New Books and Publications

Recent American Patents

Miscellaneous Summary

Notice to Subscribers

Dodge's Adjustable Caster for Sewing Machines

Special Notices

The Torpedo Ship


What is Utility

Steam on Common Roads

Patent Claims


  • Departments


  • Notes & Queries

  • Patents

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