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Friedmann's Ejector

Incendiary Silk

The National Academy

Oriental Sand and Mud Baths

Roadmasters' Difficulties

The “Conch Pearl”

Blast Engine

Mechanical Inventions

Agricultural Inventions

A New Device for Preventing Journals from Heating

Novel Steam Generator

Miscellaneous Inventions

Improved Cabinet Seat

How to Work the New Copying Process

The Care of Tools

New Barrel Lifter

An Improved Spindle

The Otter

Natural History Notes

Engineering Inventions


  • Departments


  • New Books and Publications

  • Business and Personal

  • Notes and Queries

  • Index of Inventions

  • Patents

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November 22, 1879

Confronting Common Wisdom