Illus. in: A new digester or engine for softning bones, .... / by Denis Papin M.D. London : Printed by J. M. for H. Bonwicke, 1681. Published in: The tradition of technology : Landmarks of Western technology . More
Public domain photograph of cooking, kitchen, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain image of food, dinner, grocery store, eating, 1930s, mid-20th-century United States, free to use, no copyright restrictions.
Public domain photograph of indoor, interior activity, America in the 1930s, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.