Cataneo, Girolamo - Hier. Cataneus de arte bellica, sive, de designandis ac construendis arcibus & propugnaculis, necnon & de iis oppugnandis, expugnandis ac propugnandis : de itinere exercitus, ac castrametatione, quando expediat manus cum hoste conserere

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5[Figure 5]

Geometricæ quædam operationes,
quæ faciunt ad arcium ſeu pro-
pugnaculorum fabricam.

CAPVT PRIMVM.

QVvm inſtituerim docere modũ
delineandi ac conſtruendi pro-
pugnacula, necnon & caſtrame-
tandi, aliaq́; peragendi quæ ad ar-
tem militarem pertinent: in qui-
bus docendis occurrit vt qua-
rumdam geometricarum ope-
rationum ſit vſus creberrimus: quàm breuiſſimè fieri
poterit eas explicabo, quæ mihi magis neceſſariæ vide-
buntur.

OPERATIO PRIMA.

Data linea recta, & in ea puncto, abeo
puncto deſcribere angulum rectilineum æ-
qualem angulo rectilineo dato.

Sit linea AB, & in ea punctum C: angulus autem re-
ctilineus datus ſit DEF. Circini pedem figo in puncto
E anguli DEF, & cum altero pede deſcribo circuli por-
tionem ſupra angulum DEF, quæ erit arcus GH: & cum
eadem circini apertura, figendo pedem immobilem in
puncto c, alterius pedis ope deſcribo arcum IK ſupra

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