Volume 6, Issue 41
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Features
Tunnel through the Green Mountains
Profits of Railroads
Coal Fields of Pennsylvania
Ison's Improvements in Machinery for Making Spikes and Nails
Special Correspondence of the Scientific American
Electro-Magnetism as a Moving Power
Custom House Scrutiny in Liverpool
Hibbard's Patent Process of Tanning
Improved Railroad Brake
Improvement in Shuttles
Currents of the Ocean—Pendulum Experiments
Libbey's Leather Car for raising Hides from Vats
Great Improvement in the Piano Forte—Piano, Flute, and Viol all Combined
Roofing the Britannia Tubular Bridge
Improved Machine for Punching Leather Hose, Harness, & c
New Rate of Postage—Important Information for the Subscribers of the Scientific American
Improved Oil Cup
Patent Case—Carpet Loom
Cast Iron Buildings—Crystal Palace
The Recognition of Genius and the Industrial Principle
Errors in Printing
Pennsylvania Chrome Mines
Practical Remarks on Illuminating Gas
List of Patent Claims
Post Office Stamps
Mechanics
Inventors and Manufacturers