Table of contents
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The Celebrated Niagara Suspension Bridge - p353
doi:10.1038/scientificamerican12071867-353
The American Torpedo Boat of 1776 - pp354 - 358
doi:10.1038/scientificamerican12071867-354
Manufacturing, Mining, and Railroad Items - p358
doi:10.1038/scientificamerican12071867-358a
Recent American and Foreign Patents - pp358 - 359
doi:10.1038/scientificamerican12071867-358b
Scale for Weighing Letters, Papers, Etc. - p360
doi:10.1038/scientificamerican12071867-360
The Importance and Difficulty of the Puddling Process—Late Improvements in Mechanical Puddling - p361
doi:10.1038/scientificamerican12071867-361
Patents in Canada to American Citizens - p361
doi:10.1038/scientificamerican12071867-361b
Official Report of Patents and Claims Issued by the United States Patent Office - pp362 - 366
doi:10.1038/scientificamerican12071867-362
Pending Applications for Reissues - pp366 - 367
doi:10.1038/scientificamerican12071867-366
