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Gold-Separating Apparatus

List of Patent Claims

The Cost of Gas in Various Cities

To the Spirits-a Machine Wanted

Inhalation in Lung Complaints

Alcohol from Tomatoes

Fire Wood

The French Conservatoire des Arts

Benzole for Insects

Recent Foreign Inventions

How to Set Timber Posts

The French Exposition

Shooting Molten Iron

Progress of Photography

Races at Agricultural Fairs

Tunnels and Tunnelling

Fair of the American Institute.--Award of Prizes

Railroad Train Blown off the Track

Clasp for Leading Cattle

Curious Property of Water Divested of Air-Boiler Explosions

Impure City Water

The Assay Office

A New Leyden Jar

Railroad Economy--Prizes

Medical Virtues of Parsley

Splendid Cash Prizes

Extracting Silver from Lead


Inventors, and Manufacturers

Pennsylvania Slate


  • Letters

    To Correspondents

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