Utilizing the Sina's family donation, Johann Friedrich Julius Schmidt took care of the instruments' repairing and maintenance.
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In December 1858 the nomination for the new permanent director took place, on December 4 Johann Friedrich Julius Schmidt was nominated, and on 16 December Schmidt became the new director of Athens Observatory.
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He took advice from his friend, the Austrian ambassador in Athens Prokesch-Osten, who knew the Greek-Austrian physicist and astronomer Georg Constantin Bouris.
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In an area of two meters diameter, consisting of 25 parts and representing the visible surface of the Moon, there are drawn about 30,000 craters as observed with the 158 mm Ploessl telescope.
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