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Features

Improved Sugar Evaporating Apparatus

Adulteration of Chemicals

How Felt Hats Are Made

Blacksmith's Butteris

Direct-Acting Steam Engine

The New Water Front, New York City

Fireless Locomotive

Sash Coupling Machine

Canadian Patents - August 24, 1872

The Aurora

The American Association for the Advancement of Science

Country Churchyards

Plaster Casts

Influence of Variously Colored Light on Animal and Vegetable Growth

Letter from Professor R. H. Thurston - August 24, 1872

Miscellaneous Items - August 24, 1872

Recent American and Foreign Patents - August 24, 1872

New Patent Law in Canada - August 24, 1872

Departments

  • From the Editor

    Answers to Correspondents - August 24, 1872

  • Letters

    Correspondence - August 24, 1872

  • Recommended

    New Books and Publications - August 24, 1872

  • Departments

    Notes and Queries - August 24, 1872

  • Business and Personal - August 24, 1872

  • Index of Inventions - August 24, 1872

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August 24, 1872

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