Zubler, Leonhard - Fabrica et vsvs instrvmenti chorographici : qvo mira facilitate describuntur regiones & singulae partes earum, veluti Montes, Vrbes, Castella, Pagi, Propugnacula, & simila

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3323INSTRVMENTI CHOROGRAPHICI, &c.

Ad ſecundam tunc ſtationem conſcende, Aſſeremq́ue
@um lineâ ſtationali iterum move verſus primam ſtatio-
nem: hoc firmato, itidem lineas occultas facito verſus ſin-
gula ædificia, & curato ut lineæ in Aſſere omnes ſeſe inter-
ſecent. Hoc peracto, & ſtatione tuâ ſive lineâ notâ menſu-
ratâ perticis ab A ad B. reperies perticas 90. Hac diſtantiâ
ab A ad B Circino translatâ de Aſſere in ſcalam, reperies
ſimiliter perticas 90.

Sic ab arce I cognoſcere potes diſtantiam ad reliqua
præcipua ædificia: adeò ut inde ad ſingula propugnacula
reperias perticas 125. ad portas verò principales perticas
90 Præterea propugnacula ſingula diſtant à ſe perticis 180.
& locus ubi arx ſita eſt, ab uno angulo ad alterum diſtat
perticis 70.

Inductio talis eſt:

Ab arce I ad { B \\ D \\ F \\ H } ſunt perticæ 125. quæ faciunt pedes 2000.

Abarce I ad { A \\ C \\ E \\ G } ſunt perticæ 90. quæ faciunt pedes 1440.

Singula porrò propugnacula diſtant à ſe perticis 180.
quæ faciunt pedes 2880.

Area denique quadrata conſtat perticis 70. quæ faciunt
pedes 1120.

Nota.

Si in turri vel monte exiſtens, diſpoſito Inſtrumẽto per-
pendiculariter (ut diſponi debet) per dioptras in Vallem
vel profunditatem ſubjectam deſpicere nequis, ita tunc o-
perare@ ſume perpendiculum, & illud ad ambas dioptras

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