On the Construction of Engines of War (Belopoeeca)

10.6 A modern numerical classification used by the library for internal tracking.

1. 6. 590 This is the specific shelfmark for this volume within the Magliabechiana collection.

Shelfmark A unique identification code assigned to a book or manuscript to indicate its specific location on a library's shelves.
Archival notation Handwritten or stamped marks made by librarians over the centuries to catalog and organize historical volumes.
Magliabechiana The name of a major collection within the National Central Library of Florence, originating from the private library of the scholar Antonio Magliabechi (1633–1714).