Volume 7, Issue 5
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Features
Hudson River Railroad
Bushnell's Improved Metal Drill
The East Tennessee and Georgia Railroad
Block from the old Frigate Hussar
Healey's National Picture
The Fair of the American Institute
Copper in Wisconsin
Beards
Porter's Tuyere Iron
Poetry and the Fire Annihilator
Stove Polish
Culture of the Olive
The Exhibition of the Franklin Institute
Scorpions in Egypt
Millholland's Coal Burning Locomotive
Liebig on Electro Magnetism as a Motive Power
American Telescopes
Cedars and Pines of California
Improved Machine for Drying Clothes
Improved Seed Planter
Smoke Condensing Grate
Improvement in Carriage Springs
Improvement in Taps for Cutting Screws
Improvement in Pianofortes
Improved Lamp
Patent Office Report for 1850--No. 5
United States Steamships
The Fire Annihilator--An Old American Invention
Fringe Twisting Machine
A Word to Apprentices
More Improvements Wanted
Mechanism
List of Patent Claims
Patent Office Building
The Eatonton Railroad
Petition for Extension of a Patent
Postage on Books
New Edition of the Patent Laws
Binding Volume 6
Patent Claims
Back Numbers and Volumes
A Disinfecting Agent
Cure of Rattlesnake Bites
Varnish for Oil Paintings
Immensity of Space
New Prospectus to Mechanics
Inventors and Manufacturers