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The Quadruple Invention

Double-Action Parallel Rotary Steam-Engine

Davenport & Bridges' Improved Car

Mammoth Cave


  • Rain in Summer

  • Antipathies

  • Departments

    Interesting Experiments

  • New Inventions

  • First Principles of Mechanics

  • The Art of Painting

  • Curious Arts

  • Religious Intelligence

  • Gently Scan the Fellow Man

  • Illustrations of Chemistry

  • I Live in Hope of Better Days

  • Items

  • To the Mechanic

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis