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Improved Brick Machine

On Flying Machines

Miscellaneous Summary

The Children of Mechanics

The Steam Engine Indicator

Spaulding's Patent Broom Head

A Strange Inconsistency

The Heated Term--How to Keep Cool

Important Decision in Interference Case

The Markets

Importance of Bags

The Production of Timber

The Needle Gun

Our Commercial Marine

Patent Claims

Issued from the U. S. Patent office


  • Departments


  • Notes and Queries

  • New Inventions

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July 28, 1866

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