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Plate 31-XX shows how any of the Caldrons shown in plates 30 or 32-X can be arranged with power mixing devices.

Plate 31-XX shows how any of the Caldrons shown in plates 30 or 32-X c...

Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description

La Fayette in 1777; devices for La Fayette's sword-guard

La Fayette in 1777; devices for La Fayette's sword-guard

Public domain scan of 18th-century print, free to use, no copyright restrictions image - Picryl description

Kelly Miller's history  of the World War for Human Rights: A wonderful array of striking pictures made from recent official photographs, illustrating and describing the new and awful devices used in horrible methods of modern warfare, together with remarkable pictures of the Negro in action both in Army and Navy. [Title page]

Kelly Miller's history of the World War for Human Rights: A wonderful...

Public domain history book page scan, free to use, no copyright restrictions image - Picryl description