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

Patent Self-Packing Steam Valve

The Watch--Its History and Manufacture

By H. F. Piaget

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

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

De Galleford's Improved Pipe Cutter

Wheeler's Adjustable Pulley for Attaching to Shafts in Place

Aluminum--A Field for Scientific Effort

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

The Value and Uses of Worn-Out Files

Etching Glass--One of the Uses of Fluor Spar

“The Wheel”

Great Reduction in Cost of Foreign Patents

Patents and Claims

Issued by the United States Patent Office

To All Whom it May Concern

New Publications

Extension Notices

Pending Applications for Reissues

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