R E G I S T E R.


XXXVI.	The principles of perfect sciagraphy are taught by means of a redoubt. Sciagraphy: In architectural and military drafting, this refers to the art of projecting shadows or creating cross-sections to show the internal structure of a building or fortification. A Redoubt is a small, enclosed defensive work.	194
XXXVII.	Example of a Castle, which is called a Citadel in Italian. original: "Citadelle" — A fortress protecting a town, sometimes serving as a final point of retreat for the garrison.	195

OF THE


I.	Constructing an equilateral triangle in the field.	200
II.	Constructing a triangle from three lines of given lengths, provided they are not too long.	200
III.	Raising a perpendicular from a point, whether on or off a line.	200
IV.	Drawing a perpendicular from the end of a line.	200
V.	Dividing an angle into two equal parts in the field.	201
VI.	Given the side of a regular figure, etc.	201
	Table of the sides of regular figures, their radius being 10,000.	202
VII.	The method of finding the three other requirements from two given things, etc.	202
VIII.	Constructing a figure in the field as required for forts.	203
IX.	Given the figure and the appropriate side, how to fortify a fortress.	204
X.	Constructing a regular figure of the largest size in the field.	204
	Table of the angles of the figures in regular polygons.	204
XI.	Finding the elements required for fortresses.	205
	Table of required elements.	205
XII.	The method of fortifying small figures.	206
XIII.	Designing a fort or a fortress in the field.	207
XIV.	Rules concerning irregular figures.	207
XV.	Examples of irregular figures.	210
XVI.	Of the Profile. A cross-section view of the ramparts and ditches.	210
XVII.	Of Ichnography. Ichnography: A ground plan or horizontal map of a fortification.	210

O F O U T W O R K S.

Outworks are secondary defensive structures built outside the main ditch of a fortress to delay an enemy's approach.


XVIII.	Construction of a ravelin. Ravelin: A triangular fortification placed in front of the walls between two bastions.	211
XIX.	Construction of a half-moon in front of the acute angle of a bastion. original: "Boulevard" — While modern French uses this for a street, in 17th-century military terms it referred to a bastion. A Half-moon (demi-lune) is an outwork shaped like a crescent or a "V".	212
XX.	Construction of a hornwork. Hornwork: A large outwork consisting of two half-bastions and a connecting wall, resembling the horns of an animal.	212
XXI.	Construction of a crownwork. Crownwork: An even larger outwork consisting of one full bastion and two half-bastions, used to protect a larger area of ground.	212
XXII.	Placing a ravelin and a crownwork in front of a hornwork.	213

THE OFFENSIVE PART.


XXIII.	General disposition of a siege.	214
XXIV.	General rule for fortifying a quarter. A "quarter" refers to the specific section of a camp assigned to a particular unit or commander.	215
XXV.	The principles of infantry castrametation. Castrametation: The art of laying out a military camp, ensuring hygiene, defense, and order.	216
XXVI.	The principles of cavalry castrametation.	216
XXVII.	Example of the quartering of an entire camp.	217
XXVIII.	How to fortify the lines of circumvallation. Circumvallation: A line of fortifications built by a besieging army to protect themselves from an enemy relief force coming from the outside.	218
XXIX.	The construction of works to be interspersed within the lines.	218
XXX.	How the form of a siege can be set down on paper.	220
XXXI.	Example of a battery. A platform where heavy cannons are grouped to fire upon the enemy walls.	221
XXXII.	The management of the approaches. The digging of "zigzag" trenches (saps) toward the fortress walls to protect soldiers from fire.	222
XXXIII.	Illustration of the gallery and the principles of the mine. A gallery is a covered passage or tunnel; a mine is a tunnel dug under a wall to collapse it using explosives.	223
XXXIV.	The efforts of the besieged.	224