Engraving depicting a builder using a plumb line to keep a walk vertical. Because of gravity the line will always rest pointing to the centre of the earth. Dated 19th Century

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Size: 5055px × 4149px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, archival, archive, builder, building, centre, century, construction, earth, engraved, engraving, force, gravity, historical, history, illustrated, illustration, line, physics, plumb, science, vertical, walk