Clavius, Christoph, Geometria practica

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139109LIBER TERTIVS. eſt, vt BE, ad AB, ita AF, ad GF; erit permutando, vt BE, ad AF, ita AB, ad 114. ſexti. FG. Eademque ratione erit vt b H, ad a F, ita a b, ad FG; ac proinde erit, vt tota
BE, ad totam AF, ita ablata b H, vel B I, ad ablatam a F, cum vtraque propor-
tio ſit, quæ AB, vel a b, ad FG.
66[Figure 66]
Igitur erit quo que reliqua IE, ad reliquam A a, vt tota BE, ad totam AF, hoc
eſt, vt AB, ad FG, cum duæ hę proportiones eædem inter ſe ſint, vt paulò ant@
demonſtrauimus.
Quo circa ſi fiat,
22
Vt IE, differentia vmbra- \\ rum rectarum # Ad Aa, differentiam ſta- \\ tionum: # Ita A B, quadrati \\ lat{us} 1000. # ad F G,
proſiliet nota altitudo FG, & adiuncta menſoris ſtatura FL, tota altitudo G L,
quęſita nota efficietur.
ALITER.
DIVIDE quadrati lat{us} 1000. per vtramque vmbram rectam, & minorem Quo-
tientem duc in differ entiam ſtationum, numerumque productum partire per differen-
tiam Quotientum.
Si namque hic vltim{us} Quotiens ducatur in Quotientem maiorem
ex priorib{us} duob{us} Quotientib{us}, produc{et}ur altitudo quæſi@a in partib{us} differentiæ
ſtationum.
Quod ita perſpicuum fi{et}.
Sit vmbra recta minor b H. 50. verbi gratia, & maior B E, 125. at differentia
ſtationum Aa, ſit 16.
paſſuum. Et quia eſt, vt b H, ad a b, ita a F, quatenus 1. 334. ſexti. F G; ſi a b, 1000. diuidatur per b H, 50. indicabit Quotiens 20. rectam a F, in
F G, contineri vicies.
Sic etiam, quia eſt, vt BE, ad A B, ita AF, quatenus 1, ad FG; ſi A B, 1000. 444. ſexti. diuidatur per BE, 125. monſtrabit Quotiens 8. rectam AF, in FG, contineri o-
cties.
Quia itaque A a, 16. paſſuum vna cum a F, continetur in FG, octies, fit vt
Aa, 16.
paſſuum octies ſumpta, vna cum a F, octies quoque ſumpta, faciat 128.
paſſus, & a F, octies ſumptam, nimirum numerum ipſi F G, æqualem. Eſt

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