The Great Polish Salt Mines

Improvement in Machine for Making Paper Pulp, Driving Reins for Horses

Tobacco Pipes

Coal or Sun

“Waste” and “Economy” of Fuel

Tremper's Three-Wheeled Velocipede

Velocipede Notes

Transmutation of Metals

Horticultural Protection

Coloring of Marble and Other Building Stones—A New Process

The Darien Ship Canal—Water Communication between the Atlantic and Pacific

Trials and Triumphs of Inventors

Improvements in Enameling Iron Ware

Manufacture of Artillery Powder in England

Editorial Summary

Answers to Correspondents

Applications Before Congress for the Extension of Patents

New Publications

Manufacturing, Mining, and Railroad Items

Recent American and Foreign Patents

Official List of Patents

Issued by the United States Patent Office