Dials and dialling:
telling time
Portable time-telling devices
are illustrated in Cosmographia. The image of the globe shows a diptych (two-fold) sun dial
and a small pillar dial. The illustration also depticts a small
quadrant, another instrument sometimes used for time-telling.
The diptych is explained in great detail later in the text. Also
discussed is the nocturnal, an instrument for determining time
at night. |