Barrow, Isaac, Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur

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9779 : : CF. quapropter erit ex æquo . : : . .
non diſpare ratione conſtabit eſſe . Nv: : . . ergò cùm
tres
, , NV ſe æqualiter excedant;
etiam tres , , 11_21 hujus Lect._
_Hy
p._
æqualiter excedent;
unde conſequetur eſſe Cα-Cβ& lt; Cβ-Cγ;
nec non eſſe α G-β H& lt; βH-γI; adeóque conjunctim 22_22 buius Lect_ - CH & lt; CH - CI; hoc eſt CK-CL & lt; CL - CO; hoc
eſt
denuò LK &
lt; OL: Q. E. D.
XV. Hinc apparet rectiùs illapſam refringenti lucem magìs inſpiſſa-
ri
;
versúſque punctum Z in arctius redigi; maximam proinde vim
ejus
iſthic exeri;
focúmque combuſtionis (ad ſolem) ibi verſari.
XVII. Quinimò tandem ex his colligitur viſibilis longinqui puncti
ſpeciem
oculo, in axe poſito, circa punctum Z apparere.
Etenim ab
ei
adjacentibus partibus refracti cùm præ cæteris perpendiculares (vi
proinde
fortiores, &
recollectu paratiores) neque non copioſiores
affluunt
;
quibus ex cauſis imaginis poſitio dependet; ut jam ſæpiùs
admonitum
:
- ἐχ{θρ}όν δέ {μο}ι {ἐστι}ὶν Αὖπς ἀeιζήλως {ηῤ}ρημένα μυ{θσ}λο {γρ}ύ{ει}ν
cæterùm
hâc defunctus curâ tantiſper reſpirabo.

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