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The Horizontal Pendulum

Is Gravity a Mode of Motion?

Stick to the Law

Medical Progress in 1877

Heinrich Daniel Ruhmkorff

The Mail of the Metropolis

Patent Office Employees to be Disgraced

Folding-Door Fireproof Safe

Modern Torpedo Warfare

A New Digging Machine

Smith's Improved Windmill


Making Callipers

Improved Portable Cider Mill

Powell's Improved Cotton Harvester

The High School of Kolapore, India

The Long-Necked Chelodine

By C. Few Seiss

Whales and Whalebone

A Fowl Monstrosity

By John Michels

Beard's Thill Coupling

Astronomical Notes

By Berlin H. Wright

Wants and Business Inquiries


  • Departments

    Business and Personal

  • Notes and Queries

  • Index of Inventions

  • Patents

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February 09, 1878