Using a cross-staff to measure the height of a tower. From Robert Fludd 'Utriusque cosmi ... historia', Oppenheim, 1617-1619. Engraving

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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ..., 1617-1619., archival, archive, cosmi, cross-staff, engraving, fludd, height, historia, historical, history, instrument, mathematical, measure, measurement, oppenheim, robert, surveying, tower, tower., utriusque