Child labor at a mine site

1200 × 869

dark mine shaft interior

1200 × 673

miner in ballet tutu

1429 × 2000

Red mining tower at sunset

3568 × 2402

Industrial rail yard with smokestacks

3000 × 2329

Niagara Falls Mill District 1899

1024 × 768

Minnesota Point from Incline Railway

4000 × 3135

Manhattan Bridge under construction

1600 × 1112

Cutting teddy bear skins

1800 × 1309

Car assembly in early factory

1366 × 768

Women working on aircraft assembly

1300 × 1034

Women working in a factory

3124 × 3684