Skip to main content

Features

The Panama Canal--A New Project for Its Completion

How to Purify Drinking Water

By Peter T. Austen

An Improved Metallic Shingle

An Improved Railroad Tie and Chair

An Improved Sunshade Hat

An Improved Tool and Handle

An Improved Toy for Children

A Ridge and Hip Covering for Roofs

A New Aerial Apparatus

A Cheap Flash Lamp

A New Method of Electrically Driving Tuning Forks

Simple Calls for Telephone Lines

Departments

  • Letters

    Correspondence- February 22, 1890

  • Recommended

    New Books and Publications- February 22, 1890

  • Departments

    Notes & Queries- February 22, 1890

  • Recently Patented Inventions- February 22, 1890

  • Index of Inventions- February 22, 1890

  • To Inventors- February 22, 1890

Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format
February 22, 1890

Complex Causes. Alternative Solutions.