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Features

Eggleston's Improved Saw Mill

Endurance of Submarine Cables

Legal Tender

New Process of Tanning

Hydro-Steam Engine

Subdivisions of Chemistry

Saw Mill Wheels

List of Patent Claims

A Superior Washing Fluid

Working of Cast Steel

Expulsion of Air from Aqueduct Pipes

Growing Rubber in the United States

Management of Root Crops

Night Spectacles

Preserving Wrought Iron Tanks

The Steamship Great Eastern

Burnham's Improved Diaphragm Pump

Map Adjuster

Information Wanted--A Model Wanting an Owner

Inventions Wanted--Coal Burning

The Burning of Gunpowder

Museums for Models, &C

Sending Money by Mail

The Manufacture of Iron

More About the Sex of Bees

Baling Cotton

Mud Houses

Self-Acting Regulators

The Magic Corn Husker

Chinese Plants

Smooth Surface on Castings

The National Hotel Sickness

Church Clocks

Speed of Electricity

The Pacific Railroad

Mechanics

Inventors, and Manufacturers

Departments

  • Letters

    Correspondents

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March 28, 1857

Beyond XX and XY

Biology. Identity. Equality.