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Features

Patent Self-Packing Steam Valve

Rationale of the Therapeutic Action of Arsenic in Diseases of the Skin

Alloys--Review of a Lecture by Dr. A. Matthiesen, F. R. S

The Watch--Its History and Manufacture

By H. F. Piaget

Editorial Summary

American Institute Polytechnic Club

Controlling Water Currents--Deepening the Channels of Rivers

Manufacturing Mining, and Railroad Items

Recent American and Foreign Patents

Answers to Correspondents

Curley's Patent Adjustable Curtain Fixture

Wheeler's Adjustable Pulley for Attaching to Shafts in Place

De Galleford's Improved Pipe Cutter

The Value and Uses of Worn-Out Files

Importance of Studying Cause and Effect--A Hint to Inventors

Great Reduction in Cost of Foreign Patents

Etching Glass--One of the Uses of Fluor Spar

Aluminum--A Field for Scientific Effort

Patents and Claims

Issued by the United States Patent Office

To All Whom it May Concern

Extension Notices

New Publications

Pending Applications for Reissues

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May 16, 1868

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