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Features

McDougal's Disinfecting Powder

Improved Harvester

Saving Bacon

Progress in Ireland

American Association for the Advancement of Science

Florida Railroads

Pennsylvania Polytechnic College

List of Patent Claims

Electro-Chemical Baths

American Blister Flies

A Simple Microscope

Decimal Weights and Measures

The Geography of Plants

Advice to Manufacturers of Tin Plate

The Hughes Telegraph

Water-Proof Textile Fabrics

Improved Water Wheel

Poisoning with Strychnine Cured

Inventions Wanted

Tree Cutting Machine

The Inventor of Purifying Molten Crude Iron without Fuel an American

Our Great Ships

Recent American Patents

Franklin

Resignation of the Commissioner of Patents

The Scientific American Prizes

Uses of Cypress Bark

The Plow.--An Improvement Wanted

A Marine Locomotive

Death of a Celebrated Navigator

Geographical Expeditions

Great Exhibition of the American Institute at the Crystal Palace, New York

Prevention of Smoke

Thrashing by Steam Power

Important Items

Correspondents

Prospectus

The Life of Seeds

Improved Seed Sower

Developement of Races of Animals

Gum Copal

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    Why Do Facts Fail?

    Why Do Facts Fail?

    Deconstructing Denial