#  . 

 



 ![Magnetic Azimuth Diptych Sundial](/sites/g/files/omnuum6316/files/chsi/files/bloud_diptych.jpg)

 

**Magnetic Azimuth Diptych Sundial**  
  
**Dieppe, France was the center of manufacture of ivory diptych sundials of a type different than those principally made in Nuremberg, Germany. The example shown here has a movable hour scale inside the compass box and uses the compass needle as the index of the hour when the sundial is oriented properly. The lunar volvelle on this sundial also helps to determine the tides.  
  
Curator Sara Schechner gives a demonstration of [this type of sundial](https://www.youtube.com/watch?v=ZOmt61lZtFg&feature=youtu.be&list=PLHFj-U-PqtWzsB7GszXXSZvzKu1not3Qb).**  
  
 **CHSI Inv. Number [7568](https://qrgo.page.link/7D9kQ)  
Date: 1636  
Leonhart Miller  
Nuremburg, Germany  
  
  
Back to ["Time, Life, & Matter: Colonial Science"](/exhibitions/tlm-colonial-science).**