Volume 30, Issue 12
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Features
The Great Lava Flood of Oregon
A Congressional Patent Discussion
A Remarkable Report about Remarkable Pumping Engines
Dangers of Nursery Explosives
American Soda
Scientific Results of the Polaris Expedition
Nerve Force
Acoustic Darkness and Mental Light
Font Pen with a Capillary Feeder
Improved Self-Closing Faucet Attachment
Watson's Butter Former
Schofield's Improved Needle Threader
The Newfoundland Devil Fish
Barnum's Removable Horseshoe Calk
Chemical Notes
Improved Automatic Tool Grinding Machine
Improved Circular and Band Saw Set
House Top Gardening
To New Subscribers
Decisions of the Courts - March 21, 1874
United States Circuit Court
Patent Office Decisions
Recent American and Foreign Patents
Importance of Advertising
Answers to Correspondents - March 21, 1874
Canadian Patents - March 21, 1874
LIST OF PATENTS GRANTED IN CANADA,