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American Iron and Steel--Pittsburgh, the Iron City

The African Interior

By P. B. Du Chaillu

News for Mechanics

M'Master's Patent Clothes Line Holder

West Spruce St. Baptist Church, Philadelphia

Manufacturing, Mining, and Railroad Items

Answers to Correspondents

Bureau of Naval Engineering--Some Hard Facts

The Heaton-Bessemer Correspondence

Summary of the Velocipede

Emery Wheels--How They Should be Made

American Beet Root Sugar

Do Laboring Men Have Time to Study?

Patent Office Contracts

Increasing the Power of Steam by Superheating

Improvement in Finishing Pictures

The Philosophy of the Oven

Reported for the Scientific American

Editorial Summary

A New Register for Business Men

Economical and Simple Heater for Steam Boilers

Mechanical Skill of Savages

New Publications

Recent America and Foreign Patents

Official List of Patents

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January 23, 1869

Scientific American Space & Physics