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Capital Invested in Railroads in Massachusetts and New York - p249
doi:10.1038/scientificamerican04271850-249
To Restore Ale or Porter that has Turned Sour or Flat - p249
doi:10.1038/scientificamerican04271850-249i
Correspondence of the Scientific American - p250
doi:10.1038/scientificamerican04271850-250
The Michigan Block for the Washington Monument - p250
doi:10.1038/scientificamerican04271850-250f
World's Exhibition of Industry for 1851 - p251
doi:10.1038/scientificamerican04271850-251b
Great Invention for Shooting and Capturing Whales - p252
doi:10.1038/scientificamerican04271850-252
New Helical Railway and Circular Chariot - p252
doi:10.1038/scientificamerican04271850-252c
New Rail Road Invention—Self-Acting Coupling - p252
doi:10.1038/scientificamerican04271850-252e
More about the Stereotype Process said to be Discovered in Paris - p252
doi:10.1038/scientificamerican04271850-252g
Great Movement among the Working Classes in New York - p253
doi:10.1038/scientificamerican04271850-253c
Georgia Burr Versus French Burr Stones - p253
doi:10.1038/scientificamerican04271850-253h
History of Propellers and Steam Navigation - p256
doi:10.1038/scientificamerican04271850-256b