A rectangular decorative woodcut headpiece features symmetrical floral scrolls, leaves, and blossoms, with a central flaming urn or torch motif.

The First Part

First Section.

Of the various types of calculations with simple quantities.

---

Chapter 1.

Of the mathematical sciences in general.

First, anything that is capable of increase or decrease, or to which something can be added or taken away, is called a quantity.

Accordingly, a sum of money is a quantity, because it can be added to and taken away from.

Likewise, a weight is a quantity, and so are many other things.