Other
Kingwood Library: American Cultural History: 1880 1889
The 1880's in America were chock full of new architecture, technologies, businesses, modern conveniences such as gas and electric, operas, fashions, and much more as featured in this resource.
PBS
Pbs Building Big: The Brooklyn Bridge
A history of the construction and some general facts on the Brooklyn Bridge are found at this website. Not incredibly detailed, but a good reference for information.