4 holdings are shelved on this floor. A shared floor records where volumes sit and nothing about what any of them says; these are neighbours, not relations.

• MS 1444.15 Central Spiral

  Central Spiral is the official designation for the primary helical structure of the Tower. It is not a single location but the foundational …

• MS 3370.77 Persistence
• MS 0228.90 Provisional Registries
• MS 8486.99 Spiral Apertures

  Spiral Apertures are the designated, quasi-architectural openings that punctuate the primary structural spirals of the Tower. They serve as …