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The Broadway and Seventh Avenue Cable Road

Charles Pratt

Defenseless Condition of our Seaports

Dr. Edward Maynard

New Method of Chamfering Stone

An Improved Wrench

Open Column Manometer on the Eiffel Tower

Improvement in Jack-Screws

Ancient Methods of Drawing Water



  • Letters

    Correspondence- May 16, 1891

  • Recommended

    New Books and Publications- May 16, 1891

  • Departments

    Recently Patented Inventions- May 16, 1891

  • Notes and Queries- May 16, 1891

  • Business and Personal- May 16, 1891

  • Index of Inventions- May 16, 1891

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May 16, 1891

Of Shamrocks and Science

Happy St. Patrick’s Day