Volume 25, Issue 9
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Features
Chrysalids and Cocoons
The New School of Mechanical Engineering at Hoboken, N. J
The Westfield Explosion--How Boilers Ought to be Inspected--Interesting Testimony by a Wide Awake Man
Improved Method of Drawing Patterns for Flaring Vessels of Sheet Metal
Adjustable Tension Razor Strop
The Westfield Explosion. The Verdict—Warrants for the Arrest of the President, Superintendent, and Engineer Who are the Real Culprits?
State Interference with Patents
Rating Steam Boilers
Objections to Darwinism
Improvements in Marbleizing Paper and Oil Cloth
Scientific Intelligence- August 26, 1871
A New Water Meter
Invalidity of State Laws Regulating the Sale of Patents
Patent Office Decisions- August 26, 1871
Queries- August 26, 1871
Answers to Correspondents- August 26, 1871
Recent American and Foreign Patents- August 26, 1871
Official List of Patents- August 26, 1871
Issued by the U. S. Patent Office