Vitruvius iterum et Frontinus à Iocundo revisi repurgatique quantum ex collatione licuit

Concerning the mixtures of blue. Chapter XI.
How ceruse white lead, verdigris green pigment, and sandarac red arsenic sulfide are made. Chapter XII.
How the most excellent artificial purple dyes are made. Chapter XIII.
Concerning purple colors. Chapter XIV.

CHAPTERS OF THE EIGHTH BOOK.

Concerning the discoveries of water. Chapter I.
Concerning rainwater. Chapter II.
Concerning hot water, and what powers it has coming from different metals, and concerning the nature of various springs, rivers, and lakes. Chapter III.
Concerning the property of some places and springs. Chapter IV.
Concerning the tests of water. Chapter V.
Concerning the conduction and leveling of water and the instruments for this use. Chapter VI.
In how many ways water may be led. Chapter VII.

CHAPTERS OF THE NINTH BOOK.

The discovery of Plato concerning measuring land. Chapter I.
Concerning the discovery of the Pythagorean norm from the deformation of a right-angled triangle. Chapter II.
How a portion of silver mixed with gold in a whole work can be detected and discerned. Chapter III.
Concerning gnomonic methods discovered from the rays of the sun through a shadow, and the world and the planets. Chapter IV.
Concerning the course of the sun through the twelve signs the zodiac. Chapter V.
Concerning the stars that are from the zodiac toward the north. Chapter VI.
Concerning the stars that are from the zodiac toward the south. Chapter VII.
Concerning the methods of clocks and the shadows of gnomons at the equinoctial time, at Rome, and in some other places. Chapter VIII.
Concerning the method of clocks, and use, and their invention, and by which inventors. Chapter IX.

CHAPTERS OF THE TENTH BOOK.