Skip to main content

Features

Improvements Needed in the New Navy

The Ammonia Motor

An Improved Freight Car Door

Improved Safety Devices for Elevators

An Improved Piano Action

Towing Canal Boats by Electricity

A Method of Tunneling

By Harold Avery

Vertical Cylinder Boring Machine

Improved Siphon Condenser

The World's Fair Franklin Statue

An Improved Weed Puller

An Improves Dumping Car

A Bow for Stringed Musical Instruments

To Inventors- January 23, 1892

Patents- January 23, 1892

Departments

  • Letters

    Correspondence- January 23, 1892

  • Recommended

    New Books and Publications- January 23, 1892

  • Departments

    Business and Personal- January 23, 1892

  • Notes and Queries- January 23, 1892

  • Recently Patented Inventions- January 23, 1892

  • Index of Inventions- January 23, 1892

Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format
January 23, 1892

Beyond XX and XY

Biology. Identity. Equality.

Learn More