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Features

Improved Railway Supply Apparatus, Improved Rotary Grates, and More

Metal Spinning

By John Anderson

H. W. Staples' Automatic Lamp-Filler

Editorial Summary

Tent Roof Garden Chair

Communication With and Between Deaf Mutes

Aerial Navigation

NUMBER FIVE

Seasoning Boards

Oxygen as a Source of Heat and Light

By Adolph Ott

“How to Observe the Sun”

By J. N. Farrar

The Manufacture of Lookingglasses and Mirrors

The Origin of Candles

The Great St. Pancras Railway Station

Life-Saving Guns

The Spirit of the Age

The Steam Engine Indicator

What We Have Done in 1869 and What We Intend To Do in 1870

Progress of Labor

Brain and Muscle

New Publications

Announcement for 1870.—A Splendid Work of Art and Cash Premiums to be Given

Manufacturing, Mining, and Railroad Items

To Keep Cellars From Freezing

Recent American and Foreign Patents

Official List of Patents

How to Obtain Letters Patent for New Inventions

Applications for Extension of Patents

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    Correspondence

  • Business and Personal

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Why We Need Our Zzzs

Why We Need Our Zzzs

Vital for Memory, Mood and More