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Features

Improvement in Steam and Water Indicators, Concentrated Progress of the World, and more

Aide Memoire for Silicious Formulae

Practical Horology in America

Ice Machines

Transmission of Hydraulic Power From its Source to Propel Machinery at a Distance

What Science Owes to Missionaries

Fruit Car-Eastern Market for Western Productions

Half a Day at Collinsville

Averill's Metallic Weather Strip

Savoy's Patent Metallic Boot and Shoe Shank

M'creary's Patent Carriage Clip

Manufacturing, Mining, and Railroad Items

Recent American and Foreign Patents

Answers to Correspondents

New Publications

Propelling Boats on Canals

Manufacture of Plugs and Bungs

Pretentious Teachers

Are the Direct Rays of the Sun Healthy?

Mechanical Skill Not Always Artistical Taste

Editorial Summary

Patents and Claims

Issued by the United States Patent Office

Patents

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September 23, 1868

Beyond XX and XY

Biology. Identity. Equality.