Dresden: Clocks and surveying and navigation instruments in the Mathematisch-Physikalischer Salon

17th and 18th centuries.

The topographic survey diary on a long strip of paper was created by Augustus II “The Strong”, Elector of Saxony and later King of Poland, an avid and knowledgable surveyor, vital patron of arts and architecture and supporter of a variety of scientific endeavors.

On the large world clock, only the single large surface rotates, so the hour numerals on each of the 360 dials pass under the hour hands, which hang directly downwards, unmechanized.

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