Curiosity and ingenuity - Scientific Collections and Experimentation at Padova in the 18th Century
 
Vallisneri
Sundial called an equatorial or equinox clock
signed "And.Vogl. XVII secolo"
Complete skeleton of a human foetus
Opere fisico-mediche
Sundial called an equatorial or equinox clock
Fragment of Nautilus shell
Narwhal tooth
Shell mounted onto a candelabra
Rhinoceros horn with brass base

 

To work, this instrument's dial has to be parallel to the equator and, when the sun is exactly over the equator, it gives the time of the equinoxes, hence the two names of this clock.
The position of the dial can be adjusted according to the latitude of where the measurement is taken, which is why these types of sundials were so universal. The maker, Andrea Vogler, worked in Augusta in the second half of the eighteenth century
.


Orologio solare detto equatoriale o equinoziale, firmato Andrea Vogler XVII secolo



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