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Improved Air Engine, Preservation of the Teeth

A Visit to the Great Volcano of Kilauea

The Military Railroad System of the United States

Miscellaneous Summary

Professor Treadwell on Hooped Cannon

Olmstead's Oil Can

American Machine Tools

Extension of Patents--For Whose Benefit They are Granted

The Scientific American for the Ensuing Year

Potatoes in Fat

Classical vs. Scientific Education

A Hint for the Holidays

Aluminum Bronze Bearings

Patent Claims

Recent American Patents

Recent English Patents

Fogle's Oil Cup


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