Magnes sive, De arte magnetica opus tripartitum

• 1643
• Athanasius Kircher
  Cologne: Jodocus Kalcoven, 1643
• 20 cm H
• In the Edelstein Rare Book Room
• Roy G. Neville Historical Chemical Library
• b1034025

Description

The sunflower clock, which purportedly uses heliotropism to measure time