1930s ' Miscellaneous Metals' - Illustration diagram showing copper being taken from raw ore.
Children's Encyclopaedia from early 1900s.
Size: 3234px × 4752px
Photo credit: © Michelle Bridges / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: 1900s, 1930s, copper, diagram, education, history, illustration, learning, machines, manufacturing, metal, ore, raw, social, steel
