Clavius, Christoph
,
Geometria practica
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LIBER TERTIVS.
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xml:space
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">ALTITVDINEM monti impoſitam, ſi modo altitudinis baſis poſſit
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conſpici, vel portionem ſuperiorem alicuius turris, beneficio ſpeculi
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plani efficere notam.</
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ad turrim patet acceſſus, vt eius à menſore diſtantia cogno-
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ſcipoſsit; </
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<
s
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xml:space
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">inueſtigetur tam altitudo à ſummitate portionis pro-
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poſitæ, vſque ad baſem turris, quam altitudo ab infima parte eiuſdem portio-
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nis, vſque ad eandem turris baſem: </
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">& </
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<
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xml:space
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">minor hæc altitudo ab illa maiore de-
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matur, reliqua fiet portio, quæ inquiritur.</
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<
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verò, quando altitudo monti eſt impoſita, & </
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ret, aut ad turrim nonpatet acceſſ
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us: </
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">exquirenda erit per præcedens problema
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vtraquealtitudo prædicta. </
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">Namrurſus minor detracta exmaiore, reliquam fa-
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ciet altitudinem, vel portionem, quæ deſideratur.</
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<
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g@onis cuiuſuis in plano deſcribere, ſi è duobus locis intra ipſum ſi-
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tum aſſumptis baculi ex omnibus campi angulis erecti, vel certè
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ipſi anguli in ædificio, aut vrbe, vel loca regionis videri poſſint: </
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mulque longitudines laterum campi, vel ædificii, nec non diſtan-
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tias inter angulos, & </
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ſura cognoſcere. </
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">Quod ſi talia duo loca intra ſitum eliginequeant,
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idem efficere, dummodo ſitum poſſimus circumire.</
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<
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<
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problema hocvel Geographicum eſt, vel Architectonicum; </
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cuiuſuis, quo
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pacto ex duo-
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b{us} locis in-
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tra ipſum aſ-
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ſumptis deli-
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neetur.</
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men quia ſine dimenſione linearum abſolui non poteſt, lubet illud hocloco
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paucis explicare. </
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cinctus. </
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<
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losrectos cum Horizonte, paretur que circa medium areæ planum aliquantu-
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lum altum Horizonti æquidiſtans, in quo duo puncta F, G, quantumlibetin-
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ter ſe diſtantia, verbigratia 100. </
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poſsint. </
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gmentum F G, 100. </
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pinna cidiis in vtroq; </
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per eorum circumferentias angulorum magnitudines, qui in F, G, conſtituẽtur,
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cognoſcipo ſsint, inſpiciantur ex F, & </
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<
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ducta dioptra) baculi ex angulis A, B, C, D, E, erecti, & </
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<
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cũ recta HI, facit, aut quos rectæ à linea fiduciæ deſignatę inter ſefaciunt, tranſ-
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ferantur ordine ad puncta K, L, quomodocunq; </
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