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The Pulsometer

The "Granges" and their Object

The Study of Mathematics

The Flowing Oil Wells of Pennsylvania--Great Decline in the Price of Oil

Scientific and Practical Information - August 30, 1873

The Sun's Distance and How it is Measured

Engines of Admiral Porter's Torpedo Boat

Concrete Siphons on the Canal Quintino Sella, Lomellina, Italy

Reversing Gear for Rolling Mills

Nature and Art

The Devil Fish

The Great Exposition--Letter from United States Commissioner Professor R. H. Thurston

Brick Compressing Machine

The Diamond Cotton Chopper and Cultivator

French Four Axled Articulated Locomotive

Recent American and Foreign Patents - August 30, 1873

Answers to Correspondents - August 30, 1873

Communications Received - August 30, 1873


  • Letters

    Correspondence - August 30, 1873

  • Departments

    Business and Personal - August 30, 1873

  • Notes and Queries - August 30, 1873

  • Index of Inventions - August 30, 1873

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