Uffenbach's "Zeitweiser" published 1598
Abstract
In the year 1598 Philipp Uffenbach published a printed diptych sundial, which is a forerunner of Franz Ritters horizantal sundial. Uffenbach's sundial contains apart from the usual information on a sundial ascending signs of the zodiac, several brigthest stars, an almucantar and most important the oldest gnomonic world map known so far. The sundial is constructed for the polar height of 50 1/6 degrees, the height of Frankfurt/Main the town of his citizenship.
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