Clavius, Christoph
,
Geometria practica
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LIBER SECVNDVS.
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includantur. </
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<
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ctetur, quot particulæ in earum interuallis deprehenſæ fuerint.</
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<
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aſſequentur via quadam generali, quæ in omnes dimenſiones
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quadrat, videlicet. </
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tia, in exemplum regula trium Num. </
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<
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quantitati O P, (hoc eſt, differentiæ Tangentium angulorum obſeruatorum)
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æqualis; </
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<
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a eſt, multiplex A D.
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xml:space
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">Problema hoc
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1. qua ratione
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aliter ſine nu-
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meris abſolua
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tur</
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(Nos duplam accepimus) Item ſecũ dæ P N, (hoc
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eſt, Tangenti minoris anguli) æqualis, vel ęque
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multiplex cum A D, nimirum D B. </
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inſtrumento partium capiantur tot particulę A E,
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quot palmi, aut pedes in ED, differentia ſtationum
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continentur. </
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<
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rallela BC. </
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">Nam quot partes inſtrumenti partium includetinteruallum EC, tot
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palmos, aut pedes diſtantia DF, complectetur; </
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<
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xml:space
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DB, AE, EC, proportionales ſint.</
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<
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modo procedes in alijs exemplis, hoc obſeruato, vt quando ſinus
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alicuius anguli in regula trium reperitur, accipias ex tabula ſinuum ſinum, abie-
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ctis quinque figuris, vtſinus totus ſit 100. </
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Num. </
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<
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mirum ſinui tori. </
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</
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tantus eſt ſinus grad. </
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cipienda eſſet AE, æqualis particulis 80 {3/10}. </
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dabit tot palmos, aut pedes rectę F G, quot particulę in eo comprehenduntur,
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Et ſic de cęteris.</
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<
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autem tota regula 100. </
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ſinu toto quoduis interuallum inter 100, & </
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nus totius accipiantur poſtea ſinus, vt cap. </
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<
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autem nonnunquam ordinemimmutare, ponendo nimirum ſe-
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cundamquantitatem DB, in recta AC; </
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cetid expedire cognoueris ad parallelas DE, BC, ducendas.</
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ueniant, inuenire.</
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nobis fuit lẽmate 13. </
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rib{us} viis. </
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puncto concurſ{us} duarum rectarum exquiren-
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do demonſtrabim{us} illud ipſum hoc loco paulo
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aliter. </
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ſe in concurſu B, ſecant{es}. </
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lib{et} punctis E, F, G, vtcunque in </
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