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Features

Improvement in Looms

Playing with Lightning

The Light of the Stars

New and Improved Form of Simple Microscope

Walker's Patent Sash Fastener

An Important Question in Sociology--The Intermarriage of Relations

Natural Selection

Leghorn Straw Hats

Spontaneous Generation

Wanted--Light in Dark Places

Wanted a Substitute for Earth and Plaster Walls

The Hartford Steam Boiler Inspection and Insurance Company

Hail and Hailstorms

The Practical Application of the Slide Valve and Link Motion to Stationary, Portable, Locomotive, and Marine Engines

New Rule about Patent Office Drawings

Manufacturing, Mining, and Railroad Items

Interference Case--Decision of the Commissioner of Patents

Editorial Summary

New Publications

Applications for Extension of Patents

Answers to Correspondents

Recent American and Foreign Patents

Official List of Patents

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    Correspondence

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July 10, 1869

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