Curated OER
Educational Technology Clearinghouse: Maps Etc: Plan of Pittsburgh, 1903
A plan of Pittsburgh from 1903 showing principal streets, railroads and stations, bridges, and landmarks. "Pittsburgh, the second largest city of Pennsylvania, and the leading iron, steel, and glass manufacturing center of the United...
Curated OER
Wikipedia: National Historic Landmarks in Indiana: Cannelton Cotton Mill
The Cannelton mill, overlooking the Ohio River, manufactured thread and cloth for over 100 years from 1851 to 1954. Its innovative design used steam power and Southern cotton, and its utility and aesthetics attempted to make Southern...