Iron mine, ball mill. Iron ore is crushed in these cylinders by rotating, and steel balls fall in on the ore to break it up. Adams Mine, Kirkland Lake, Ont., Canada, 1961.
name: label: Collection Creator
content: d'Arazien, Arthur
setName: label: See more items in
content: Arthur d'Arazien Industrial Photographs
label: See more items in
content: Arthur d'Arazien Industrial Photographs / Series 2: Photographs / 2.1: Color Phototransparencies
container: label: Container
content: Box 9, Folder 1
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials