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Subject (Topic)
- Bricklayers--Labor unions9
- Building trades--United States9
- Cement industry workers--Labor unions9
- Labor unions--United States9
- Plasterers--Labor unions9
- Tile layers--Labor unions9
- Building trades8
- Building trades--Employees--Labor unions8
- Slave labor, Fortification South Carolina, Fort Sumter (Charleston, S.C.), Enslaved persons--United States7
- Fire engines, Fire departments, Fire extinction, Fire Dept, Engine companies6
- Drafting and industrial drawings, Mechanical drawing, Agricultural instruments, Agricultural machinery--Design and construction5
- Mills and mill-work, Drafting and industrial drawings, Mechanical drawing, Architecture--Designs and plans--Working drawings5
- Weights and measures5
- Ale, Boycotts, Brewery workers, Brewery workers--Labor unions, Labor unions--Corrupt practices, Labor unions--Corrupt practices--United States4
- Drafting and industrial drawings, Mechanical drawing, Architecture--Designs and plans--Working drawings4
- Drafting and industrial drawings, Mechanical drawing, Naval drafting, Naval architecture, Naval architecture Designs and plans4
- Farm equipment, Horse trading4
- Hydraulic engineering4
- Labor unions--Accounting4
- Survivors' benefits4