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The Broadway and Seventh Avenue Cable Road

Dr. Edward Maynard

Defenseless Condition of our Seaports

Charles Pratt

New Method of Chamfering Stone

An Improved Wrench

Improvement in Jack-Screws

Open Column Manometer on the Eiffel Tower

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

  • Index of Inventions- May 16, 1891

  • Business and Personal- May 16, 1891

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May 16, 1891

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