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Drilling and Boring Machine

Railway Telegraphs

Recent Foreign Inventions

Adjusting the Number and Depth of Paddle-Wheel Blades

To City Subscribers

Pennsylvania Soapstone

Iron Rigging for Ships

Improvements in Railroads

Gun Cotton and Gunpowder

Foot Prints of Reptiles in the Coal Strata of Pennsylvania

Foolscap Paper

Awards to American Exhibitors at the French Exhibition

Who'll Take the Prizes?

The Hillotype Again

Spontaneous Combustion

Reports of Railroads

Australian Expedition

Woodworth Patent Remonstrances

The Manufacture of Coke.--Railroad Fuel

Protection of Designs for Articles of Manufacture

Hints on the Value of Patents

British Association for the Advancement of Science.--No. 3

A Great Traveler

Gratitude to Improvers of the Iron Manufactures

Important Items

Another New Metal

Chemical Technology

Iodo-Nitrate of Silver

Japan Cotton



  • Letters

    To Correspondents

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December 15, 1855