Practical trigonometry. 17th century woodcut illustration showing the use of a cross-staff and quadrant for measuring distances. Here an observer is u

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Practical trigonometry. 17th century woodcut illustration showing the use of a cross-staff and quadrant for measuring distances. Here an observer is using the known width of a well to measure its depth. This illustration was first published in Quaestiones geometricae by Peter Ryff, printed at Frankfurt in 1621.

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Size: 3777px × 4724px
Photo credit: © MIDDLE TEMPLE LIBRARY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1600s, 1621, 17th, application, applied, black, century, construction, drawing, geometric, geometry, illustration, mathematics, method, monochrome, peter, practical, pythagoras, ryff, solution, triangles, trigonometry, white, woodcut