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Automatic Saw Filing Machine, Essence of Disease

Practical Suggestions on Tanning Leather

By C. Gilpin

Arctic and Antarctic Oceans

Illuminating Gas-What it is, and How it is Made

Design for a Block of Six Dwellings

Intermediate Bearing Pulley for Short Belts

Progress of the Velocipede

Hutton's Patent Automatic Sash Lock

On the Poisonous Effects of Bisulphide of Carbon, and its use for the Extermination of Animals Living Underground

The New Administration

Drowsiness and Remedies For it

The Sum of All the Motions in the Universe

Solution

Protection Considered as a Conservative Element in National Affairs

Education of Idiots

Connection on English Railway Trains

Scenting, Deodorizing, and Ventilating

Periodical Scientific Publications

Answers to Correspondents

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Official List of Patents

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Recent American and Foreign Patents

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March 20, 1869

Scientific American Space & Physics