Volume 15, Issue 3
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Features
Oil-Mining Machinery Wanted
The Miantonomoh at Queenstown
Emerson's Swage for Spreading and Sharpening Saw Teeth
Why Not?
Notes on New Discoveries and New Applications of Science
Special Notices
Irwin's Lamp Top
Man-Holes and Safety Valves
Building of Roads for Common Travel
Canadian Patents
Patent Claims
Issued from the U. S. Patent Office