Benedetti, Giovanni Battista de, Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]

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249237EPISTOLAE. trum epicycli conficit gra .36. min .13. ad rationem ſupradictam. Reſtat nunc no-
bis
inuenire angulum .b.o.c. in centro mundi inter duas lineas, b.o. et .c.o. quarum prior
eſt
primæ ſtationis, altera eſt veri motus epicycli, quod facilè intelligemus per di-
ctam
.49. lib. 1. Monteregij, cum duo latera .n.c. et .c.o. & angulus .n.c.o. ſint nobis no
ta
.
Hoc autem fiet fingendo lineam .n.h. perpendiculerem ad .o.c. quæ tanquam ſi-
nus
anguli .n.c.h. erit partium .28986. talium qualium .n.c. eſſet partium .100000. &
c.h. tanquam ſinus anguli .c.n.h. reſtantis ex vno recto, erit partium .95706. dicendo
poſtea
ſi .n.e. tanquam ſinus totalis partium .100000. dat nobis .n.h. partium .28986
quid
dabit nobis diameter .n.c. tanquam partium .39. mi .30. inueniemus .n.h. venire
nobis
ex partibus 11. mi .27. & idem faciendo de .c.h. inueniemus quod veniet no-
bis
partium .37. mi .48. quibus ſubtractis extota .c.o. quę eſt partium .60. mi .18. reliqua
erit
nobis .h.o. partium .22. min .30. capiendo poſtea radicem quadratam ſummæ qua
drati
.n.h. cum quadrato .h.o. veniet nobis .n.o. partium .25. min .12. talium qualis .n.
h
.
eſt partium .11. min .27. ſi igitur ad .o.n. tanquam partium .25. min .12. reſpondet .
n
.h.
partium .11. minuti .27. linea .n.h. ad .o.n. tanquam partium 100000. reſpon
debit
part .45436. tanquam ſinus anguli .n.o.h. qui angulus erit gra .27. minut .1. ſub
tracto
poſtea hoc angulo ab angulo .c.o.i. graduum .40. minut .55. remanebit an
gulus
.n.o.i. graduum .13. minut .54. inter lineam contingentiæ, & lineam primæ
ſtationis
in eiuſmodi ſitu.
Et ideo Mars acceſſerit ad lineam .o.c. veri motus epi-
cycli
.
Sed quia linea .o.i. contingentiæ, propter motum centri epicycli, in dictis die-
bus
.69. confecerit gradus .36. minut .13. ( præſuppoſita ſemper eadem di-
ſtantia
.o.c. quamuis nonnulla ſit differentia, quam nunc prætermittemus ) & Mars in
dicto
tempore retrogreſſus fuerit per dictum angulum gra .13. mi .54. quibus dedu-
ctis
, ex .36. & min .13. reſtabunt gra .22. min .19. itaque in diebus .69.
Mars promo-
tus
fuerit a primo ſitu gra .22. min .19. aut circiter, prius quam retrogradatio eius in-
cipiat
eſſe appa-
rens
.
290[Figure 290]

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