Lewis Wickes Hine, Powerhouse Mechanic, 1921, silver gelatin print, 25,1 x 20,3 cm. Harvard Art Museum/ Fogg Museum, Transfer from the Carpenter Center for Visual Arts. Foto: Imaging Department © President and Fellows of Harvard College

Lewis Wickes Hine, Powerhouse Mechanic, 1921, silver gelatin print, 25,1 x 20,3 cm. Harvard Art Museum/ Fogg Museum, Transfer from the Carpenter Center for Visual Arts. Foto: Imaging Department © President and Fellows of Harvard College
Lewis Wickes Hine, Powerhouse Mechanic, 1921, silver gelatin print, 25,1 x 20,3 cm. Harvard Art Museum/ Fogg Museum, Transfer from the Carpenter Center for Visual Arts. Foto: Imaging Department © President and Fellows of Harvard College
Lewis Wickes Hine, Powerhouse Mechanic, 1921, silver gelatin print, 25,1 x 20,3 cm. Harvard Art Museum/ Fogg Museum, Transfer from the Carpenter Center for Visual Arts. Foto: Imaging Department © President and Fellows of Harvard College