16th Century Altitude Dial
Altitude dial (regiomontanus type) and nocurlabe of Johannes Paulus Cimerlinus (1544 - 1585). Navigators calculated latitude and time at night with this instrument by sighting the North Star, Polaris, through the hole in the center and aligning it with markings on the perimiter. This particular instrument could also be used to tell time during the day
Picture No
10799996
Media ID
47601477
Size
2922px x 4554px
(3.0MB)
Credit
©Photo Researchers / Mary Evans Picture Library
Source
Photo Researchers
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Altitude Astronomic Astronomical Dial Johannes Paulus Sundial
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