Subject
- Military art and science.1
- Mine explosions.1
- Mines (Military explosives)1
- Mines and mineral resources.1
- Mountains.1
- Naval art and science.1
- New York (N.Y.)--Buildings, structures, etc.1
- Oil industry workers.1
- Oil wells.1
- Portuguese language.1
- Prohibition--United States.1
- Quarries and quarrying--Maryland.1
- Railroad accidents.1
- Roads--United States--History.1
- Ruined buildings--Pennsylvania--Pittsburgh.1
- Sailors--United States.1
- Sailors.1
- Seafaring life.1
- Shooting, Military.1
- Shovels.1