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Improved Scroll-Sawing Machinery, Gutta-Percha

The History and Fortifications of Metz

Deep-Sea Exploration--How Soundings are Obtained

The Artisan in Denmark Spain, Portugal and Greece

Improved Wicket for Canal Locks

The Spider

By Edward C. H. Day

The Electric Telegraph

Improved Stove Cover, Dish, and Kettle Lifter

Freeland's Lock Nuts

The Finishing and Decoration of Machinery

Modern Chemistry

What are our Colleges Doing?

The Draft of Vehicles

Chemical Experiments

Progress of Foreign Invention- September 24, 1870

The "Worm" on the Ailanthus

Mileage System of Railroad Commutation Tickets

Fair of the American Institute

Recent American and Foreign Patents- September 24, 1870

Answers to Correspondents- September 24, 1870

Applications for the Extension of Patents- September 24, 1870

Official List of Patents- September 24, 1870


  • Letters

    Correspondence- September 24, 1870

  • Recommended

    New Books and Publications- September 24, 1870

  • Departments

    Business and Personal- September 24, 1870

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September 24, 1870

Of Shamrocks and Science

Happy St. Patrick’s Day