Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description
Public domain photograph - New England history, free to use, no copyright restrictions image - Picryl description
1920-1929
Image taken from:..Title: "Mining. An elementary treatise on the getting of minerals".Author: LUPTON, Arnold..Shelfmark: "British Library HMNTS 7106.ff.19.".Page: 104.Place of Publishing: London.Date of Publish More