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Subjects
- Marine engineering.[remove]2
- Coal mines and mining.1
- Commerce--United States.1
- Deep diving.1
- Engineers--United States.1
- Inventors & inventions.1
- Mines and mineral resources--Equipment and supplies.1
- Mines and mineral resources--United States.1
- Railroads--United States.1
- Reconstruction (U.S. history, 1865-1877)1
- Steam-boiler explosions.1
- Steam-boilers.1
- Steamboats.1
- Submarines (Ships)--History.1
- Submarines (Ships)--Salvaging.1
- Transportation.1