Methods of surveying (right) and time keeping (left). On the left are various different kinds of sundials and a clock with a single arm. On the right a survey is being made of the height of the tower, using quadrants and, on the far right, a cross staff.

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Size: 2764px × 3543px
Photo credit: © Photo12/Ann Ronan Picture Library / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., /, arm., clock, cross, height, instrument, kinds, left, mathematical, measurement, methods, munster, quadrants, rudimenta, sebastian, single, staff., sundials, survey, surveying, time, tower