Book

This book is a handbook of Archimedes, and it is made up of very many parts, covering topics such as On Plane Equilibrium, Parabolic Productions, Spheres and Cylinders, Rounding, On Spirals, On Floating Bodies, Cones and Ellipsoids, Counting the Sanders, Methodology, and the Seven Pieces.

The first part is a book that contains at least seven of Archimedes' papers. These treatises are Plane Equilibrium, Spirals, Measurements of Circles, Spheres, and Cylinders, Floating Bodies, Methods of Mechanical Theorems, and Stomata. The Archimedean manuscripts are used in most of the pages of the prayer book. The Archimedes manuscript was written in the second half of the tenth century, almost certainly in Constantinople.
We know that another book they used now included 4th century B.C. works. Hyperides Attic Orator. from the Papyrus fragments and excerpts of his work by the other writers until the discovery of the Hyperides text in the However, 10 folios are in the Archimedes Palimpsest.

However, extra books were included for the Palimpsest. "Fourteen folios come from an anonymous commentary on Aristotle Categories of the third century, and another twenty folios come from another four books, of the two yet to be found."(http://www.archimedespalimpsest.org/about/)

"Thus, when you open Archimedes' collection of returns, you see not a mathematical text, not even a Greek lecture, but a prayer book. Only occasionally, at right angles to the text of the prayer book, can one discern the erased text that the current project is trying to recover."(Archimedes Palimp Project, T. (n.d.). The Archimedes Palimpsest. Retrieved November 22, 2020, from http://www.archimedespalimpsest.org/)

Archimedes Palimpsest's usual website. From top to bottom the text of the prayer book is seen and the original manuscript from Archimedes is seen as fewer texts from left to right below.

We can see the text of the prayer, and we can also see signs of the reuse of this parchment, which can still be felt even though the words at the bottom have been scratched out. Then on the prayer text, we can see that the initial O is capitalized, and then on the right side of the page there is also something like the page number "II 374". There is a big blue cross in the lower right corner of the whole picture, and it's not clear if it was added later or if it's there itself.

In the Middle Ages, parchment was very expensive as a writing medium. As a result, when copying books, often religious books, it was sometimes an option to erase the text of the original book and rewrite it on top. The original page was often split down the middle and framed in two pages so that the new text was perpendicular to the original.