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Features

Restoring Oxydized Bronze Figures

Evaporation of Salt and Fresh Water

Wall Paper Poisonous

Trees on Farms

List of Patent Claims

Priming in Steam Boilers

Inks

Hydraulic Cement for Tan Vats

Heating by Steam--The Boiler

Elastic Horn

Curves

The Amount of Air We Breathe

Sowing Flax Seed

Purifying Gas

Inventions Wanted--Harvesters

Improvement in Husking Machines

The Commissioner of Patents

Stone Cutting by Steam

Mind and Matter

Lead, Lead Pipe and Shot

India Rubber Patent Cases

Etching Marble

Lightning Conductors

Electric Printing on Glass

Correction

Turbine and Overshot Wheels

The Pressure of Confined Gunpowder When Fired

Railroad Expenses

Meerschaum Pipes

Mechanics

Inventors, and Manufacturers

Smoke-Burning Furnace

Steel for Tools

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    Correspondents

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April 11, 1857

See the World from a Different Perspective

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