The book is split up in to two essential parts, in the first he explains the mathematical operations of general use in architecture. The second part deals with the five orders and explains how to apply the mathematical operations in the first part to the construction of them. This part is subdivided into 5 chapters, for each order one. And those are subdivided into chapters dealing with different parts of each order. In a last part he shows an instrument, which he invented, to measure corners.
The exact dimensions of the book are a height of 32 cm, a breadth of 22 cm and a width of 4.3 cm. It contains 7 engravings, 5 of the orders, one of the author, and one decorative piece. It also contains many woodcuts of geometrical problems and explanations.
I can’t upload the picture.