Skip to main content

Features

The Manufacture of Photographic Apparatus

Summer Study for City Children

Problems in Economics

A Swinging Seat for Agricultural Implements

An Automatic Life Guard for Cars

An Improved Window Shade

A Carriage and Wagon Brake

A Hand Crimping Tool

The Electrical Conduit System in New York City

Electric Light Plant Steamer Bay State

Automobile Carriages

The North Sea Ship Canal

Departments

  • Letters

    Correspondence - July 20, 1895

  • Recommended

    New Books and Publications - July 20, 1895

  • Departments

    Recently Patented Inventions - July 20, 1895

  • Index of Inventions - July 20, 1895

  • Notes and Queries - July 20, 1895

  • Business and Personal - July 20, 1895

  • To Inventors - July 20, 1895

  • Patents - July 20, 1895

Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format
July 20, 1895

Beyond XX and XY

Biology. Identity. Equality.

Learn More