Narrow your results by:
- All
- United States, 94 results
- Oregon, 94 results
- Clackamas County (Or.), 45 results
- Portland (Or.), 30 results
- Multnomah County (Or.), 30 results
- Oregon City (Or.), 11 results
- Little Sandy Diversion Dam (historical), 6 results
- Cazadero Powerhouse (Or.), 5 results
- River Mill Dam (Or.), 4 results
- Oregon Museum of Science and Industry, 3 results
- All
- Machinery, 94 results
- Electric machinery, 77 results
- Electric generators, 45 results
- glass plate negatives, 40 results
- cellulose nitrate film, 28 results
- Hydroelectric power plants, 28 results
- safety film, 26 results
- Power-plants--Oregon--Portland, 25 results
- Industrial facilities--Oregon--Portland, 17 results
- Industrial facilities, 16 results