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Features

Upright Boring Machine

Horsenail Making in London

On Instinct

[Paper read before the British Association, by D. A. Spalding.]

Apparatus for Extinguishing Sparks

Improved Mop, Head

Automatic Boat Detaching Apparatus

Improved Tank Locomotive

Drawings for the Patent Office

The Determination of High Temperatures by Sound

New Discoveries Concerning Terrestrial Heat

Lake of Interest in England for the Vienna Exposition

Choosing an Occupation for a Young Man

The Latest Discoveries in the Polar Regions

Improvements in the Manufacture of Silk

Intolerance in Science

The Conflagration in Boston

Scientific and Mechanical Possibilities

Answers to Correspondents

Recent American and Foreign Patents

Practical Hints to Inventors

Departments

  • Departments

    Correspondence

  • Notes and Queries

  • Business and Personal

  • Index of Inventions

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November 23, 1872