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Features

More Experiments with Iron Targets--Whitworth and Armstrong Guns

The Improved Polar Refrigerator

Trial Trip of the Morning Star

Taxidermy--Preserving the Skins of Quadrupeds, Fish and Insects

Hints for Housekeepers

Valuable Receipts

The Proposed Canal Enlargements

The Proposition to Introduce a State Patent System

Our National Defenses

Defective Wrought-Iron

Practical Hints to the Machinist

The Iron-Clad Steam-Battery Roanoke

Important Patent Trial--Cotton-Cleaning Machines

The Attack on Charleston

Preserving Botanical Specimens

Cincinnati Water Works--The Engineers Report

Recent American Patents

Patent Claims

Issued from the United States Patent Office

Departments

  • Correspondence

  • Notes and Queries

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April 25, 1863

Complex Causes. Alternative Solutions.