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Features

Improvement in Machine for Thrashing and Winnowing

How Engineering Difficulties are Overcome

What is a Flux?

Explosive Compounds for Engineering Purposes

Beet Root Sugar

Wood Engraving—Ancient Process

Earth Closets

A Reformation in the Patent Office

The Sale of Gas by Quality as Well as Quantity

Eating Considered as Not a Fine Art

The Colors of Plants and Flowers

Velocipede Notes

Editorial Summary

Answers to Correspondents

Manufacturing, Mining, and Railroad Items

New Publications

Applications for the Extension of Patents

Recent American and Foreign Patents

Official List of Patents

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Introducing Scientific American Health & Medicine

Introducing Scientific American Health & Medicine