Volume 7, Issue 4
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Features
Notes on Military and Naval Affairs
The Handsomest Fire Engine Ever Built
Petroleum -- Experiment to Determine its Comparative Illuminating Power with Gas and Candles
Valuable Receipts
Polytechnic Association of the American Institute
Recent Foreign Inventions - July 26, 1862
The True Remedy for the Scarcity of Change
Iron-Clad Frigates--Bending Their Armor Plates
Coating the Hulls of Iron Ships
Experiments with Working Steam Expansively and with Condensers
The London Exhibition
Interesting Reminiscences
Patent Claims - July 26, 1862
Issued,From The United States Patent Office