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Features

The Centennial of the United States Patent System

A School of Ship Building--The Objects and Ideas of Its Founder

A Regulator for Dynamos and Motors

A Convenient Ear Trumpet

An Improved Copy Holder

Railroad Sleepers Arranged in Pairs

An Improved Pipe or Flue Cutter

An Improved Velocipede

An Improved Metallic Railway Tie

A Device to Block Cars on a Grade

The Hudson River Bridge

A Pug Mill for Brick Makers

A Pipe Cutter, Beader, and Expander

The Manufacture of Salt at Syracuse, N. Y.

The Codonophone

The Sebae or Silk Cotton Tree

By J. F. Coonley

The Belt Problem

An Instantaneous Shutter for Hand Cameras

A Nautico-Terrestrial Velocipede

Departments

  • Letters

    Correspondence- December 13, 1890

  • Recommended

    New Books and Publications- December 13, 1890

  • Departments

    Recently Patented Inventions- December 13, 1890

  • Notes & Queries- December 13, 1890

  • Business and Personal- December 13, 1890

  • To Inventors- December 13, 1890

  • Index of Inventions- December 13, 1890

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December 13, 1890

Think Outside the Gift Box