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Nuovo Esperimento
Object: printed book
Author: Marco Giovanni Ponta
Place of Publication: Italy
Date: 1845

This book contains a volvelle, which is one of the earliest types of movable components in books. Volvelles are composed of concentric circles of paper or parchment with rotating parts. They were introduced to Europe around the 11-12th centuries through Spain. Volvelles were most commonly used to keep time but were also used as ciphering systems and to teach various concepts in astronomy, mathematics, and other subjects.

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