Apian, Cosmographicus, 1524 (C4v)

With this 4-part movable diagram from Apian’s Cosmographicus, the user can practice a series of complicated calculations, including latitude, the times of sunrise and sunset, the duration of dawn and dusk, and the height of the sun.

Apian, Cosmographicus, 1524 (H4r)

In the center of this complicated volvelle, you can see the thread used to attach the moving parts to the page; in this picture you can see the other side of this leaf and thread.

Apian, Cosmographicus, 1524 (H4v)

In this middle of this page, and obscuring some text, is the string and paper securing the discs of the volvelle on the other side of this leaf.

Apian, Cosmographicus, 1524 (π1r)

This title page for the first edition of Peter Apian's Cosmographicus has been printed in both black and red ink.

Sacrobosco, Noviciis adolescentibus, 1485 ([1]1r)

As title pages developed in form sometimes blank leaves or pages preceded them. In this case, as you can see from the bleed-through, a woodcut on the verso of the first leaf faces the inicipt and text on the second leaf.

Sacrobosco, Noviciis adolescentibus, 1485 ([1]1v)

This woodcut---one of the standard ones accompanying Sacrobosco's astronomical textbook---is in this edition facing the beginning of the text and the incipit.