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Features

Improved Brick Kiln

Carpets and Knitted Manufactures of Amsterdam, New York

On the Heating of Water and Boilers--Curious Explosive Phenomena

On Cotton Seeds

By Horatio N. Fraser

Frictional Gearing - April 27, 2012

By E. S. Wioklin

Human Hair and Its Substitutes

Portland Cement

By Adolph Ott

Belting and Pulleys

Double Plows

The Utilization of Water in Its Relation to Public Health

The Air Filter

Photographic Toilet and Hat Rack

On the Reasons Which Have Caused the Adoption of the New Atomic Weights

Folding Chair, Lounge, and Bed

Recent American and Foreign Patents - April 27, 2012

Departments

  • Index of Inventions - April 27, 2012

  • From the Editor

    Answers to Correspondents - April 27, 2012

  • Recommended

    New Books and Publications - April 27, 2012

  • Departments

    Business and Personal - April 27, 2012

  • Notes and Queries - April 27, 2012

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April 27, 1872

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