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Features

Doane's Improved Canal Construction

Improved Form of Coal Railroad

Domestic Motors

Combined Gin House, Horse Power, and Cotton Press

The Natural History of the Curculio

By C. V. Riley

Recipes and Experiments

Mastersun's Canadian Turbine

Reversible Water Filter

Changes of Climate

Drawings of the Patents

Testing Armored Turrets—A Remarkable Experiment

A Decision by the Commissioner of Patents

The Chironectes Pictus

Aids to Ventilation

Cheap Railways

The Decrease of our Fish Supply

Letter from Professor R. H. Thurston - August 3, 1872

Scientific and Practical Information - August 3, 1872

Recent American and Foreign Patents - August 3, 1872

New Patent Law in Canada - August 3, 1872

Departments

  • From the Editor

    Answers to Correspondents - August 3, 1872

  • Letters

    Correspondence - August 3, 1872

  • Recommended

    New Books and Publications - August 3, 1872

  • Departments

    Business and Personal - August 3, 1872

  • Notes and Queries - August 3, 1872

  • Index of Inventions - August 3, 1872

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