Clavius, Christoph
,
Geometria practica
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GEOMETR. PRACT.
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<
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verò abſq; </
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<
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">numer orum auxilio problema abſoluemus, ſi attentè ea
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conſiderentur, quælib. </
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<
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quicunque B A C, & </
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<
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57
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130-01
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huius problem. </
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<
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">ſumatur A D, æqualis lateri quadrati
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AB, vel ſi eſſet nimis magnum, æqualis ſemiſsi, vel tertiæ
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parti, aut quartæ, & </
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<
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<
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<
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qualis vmbræ abſciſſę B E, (quæ ſumma cura per circi-
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numin quadrato accipienda eſt) vel eius ſemiſsi, vel ter-
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tiæ parti, aut quartæ & </
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<
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ſub-multiplices lateris AB, & </
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ſtrumento partium ſumatur AE, tot particularum, quotpalmi, aut pedes in al-
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titudine AF, continentur. </
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<
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">Si enim iunctæ rectę DE, parallela agatur BC, conti-
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nebit diſtantia F G, tot palmos, aut pedes, quotparticulę inſtrumenti partium
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in interuallo EC, comprehenduntur. </
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<
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tia F G, pedum 3. </
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">& </
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xml:space
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">Atque hoc modo procedendum erit in aliis
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exemplis omnibus, conſiderando videlicet attentè primas tres magnitudines
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Regulætrium, & </
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<
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">DISTANTIAM in plano per duas ſtationes in eodem plano factas
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per Quadratum Geometricum metiri, quando in eius extremo erecta
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eſt altitudo aliqua perpendicularis, etiamſi infimum eius extremum
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non cernatur.</
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<
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inueſtiganda ſit A F. </
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KL; </
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nita. </
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ſtabile, ita vt eius latus AD, cogitatione productum occurrat altitudini erectæ
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in F, ad angulos rectos. </
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nea fiduciæ vmbram verſam
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CD, in E, quod ſemper con-
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tinget, quando diſtantia A F,
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maior eſt altitudine F G.
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</
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<
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nor fiat angulo G, ac proin-
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de ſemirecto minor, quem
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cum AD, in A, faceret radius
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per G, emiſſus. </
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<
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de magis, vel recede per lon-
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gitudinem notam Aa, & </
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<
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locato quadrato ſupra ean-
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dem baſem, ſecetiterum dio-
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ptra ad punctum G, directa
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vmbram verſam c d, in H: </
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<
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">vmbra verſa d H, in propinquioriſtatione ma-
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ior, quam vmbra verſa D E, inſtatione remotiore, quod angulus a, maior
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angulo A. </
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<
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