Текущий экспонат - Heliometer
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Series :  Astronomical instruments
Year :  18xx
Unique ID :  as.04.0004
Authors :  ...
Issued :  Germany
Preview image in wooden frames
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"Das große Heliometer der Sternwarte am Kap der Guten Hoffnung". Heliometer, the parchment engraving is dated to the 19th century. The depiction of the heliometer and its operating principle, Early Astronomy.