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Improved Tunneling Drill

Trial of Fire Arms

Electricity at the American Institute Exhibition

Mammoth Cave and How it was Made

The Humboldt Monument

Williams' Improved Axle Box for Railway Cars

An Explosion on the Sun

Bebout's Rafter Hook

How to Prevent and How to Extinguish Fires

The Open Polar Sea

Evaporative Power of Boilers

The Sale of Patented Articles

Scientific Intelligence- November 18, 1871

The Proposed Exhibition of Vienna, in 1873

Fireproof Buildings for Preserving Public Records

Recent Patent Decisions- November 18, 1871

Answers to Correspondents- November 18, 1871

Queries- November 18, 1871

Applications for Extension of Patents- November 18, 1871

Official List of Patents- November 18, 1871

Recent American and Foreign Patents- November 18, 1871


  • Letters

    Correspondence- November 18, 1871

  • Departments

    Business and Personal- November 18, 1871

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November 18, 1871

Of Shamrocks and Science

Happy St. Patrick’s Day