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Features

A New Process for the Manufacture of Copper Wire

The Pollution of New York Harbor

More Daylight for Recreation

Good Work in the Rainy Season at Panama

Relation of the Gas Producer to Low-Grade Fuels

Immortality of Micro-Organisms

Some Home-Made Weather Instruments

By S. Leonard Bastin

Irrigation of the Yuma Valley

By Day Allen Willey

Erecting the Construction Footways of the Manhattan Bridge

The Work of a Nebraska Cyclone

Improved Lock for Cars

Patent Department

Improved Sluice Box

Elevator for Raising Ore Concentrates

Non-Refillable Bottle

Departments

  • Departments

    The Heavens in August

  • Correspondence

  • Notes and Queries

  • Index of Inventions

  • Recently Patented Inventions

  • New Books, Etc.

  • Patents

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August 01, 1908

Beyond XX and XY

Biology. Identity. Equality.