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# Title: [Philosophiae Naturalis Principia Mathematica] Philosophiæ Naturalis Principia Mathematica (shelfmark Leibn. Marg. 166)
# Folio 207, page id 1041163592:0241
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1III
PRINCIPTA MATHEMAELOA
Scholium.
Flarum accractionum haud multum dissimiles (unt Lveis releri-
ones et retractiones, factae secundum datam Secantium racionem, ut
invenie Snellius, Sc per conseguens secundum datam Sinuum ratio
nem, ut exposuit Cartesus. Namque Lucem successire propagari
ec spacio quasi septem vel octo minutorum primorum a Solc ad
Terram venire, jam constat per Phaenomena Satellitum Zovis, Ob.
serrationibus dirersorum Astronomorum contirmata. Radii autem
in aere existences (uri dudum Grimaldus, luce per Foramen in ce-
nebrosum cubiculum admissa, invenie, ee ipse quoque expCrtUS
Cum) in cransitu suo prope corporum vel opacorum vel perspicuo-
rum angulos (quales sune nummorum ex auro, argento ec aere cu-
lorum termini rectansuli circulares, ec cultrorum, lapidum aue Fra-
clorum ritrorum acies) incurrantur circum corpora, quali actracti
in cadem; e ex his radiis, qui in transieu illo propius accedune
2d corpora incurrantur masis, qua-
si magis accracti, uc ipse etiam dili-
senter obserrari. In Agura desig-
nat sdeiem culeri vel cunei cujulvis
AsB; e 50W0C fnunf, emtme,
asta. sunt radii, arcubus 0200,
nun, mim, Est versus culerum
incurvati; idque magis vel mi-
nus pro dittantia corum a culero.
Cum autem talis incurratio radio-
rum hac in aere extra culerum, de-
bebunt etiam radii, qui incidune in culerum, prius incurrari in aere
quam culerum aEtingunE. Ec par est ratio incidentium in vitrum.
Fic isitur retractio, non in puncto incidentix, sed paulatim Per
continuam incurrationem radiorum, Factam partim in aere ante
quam accingune vierum, partim (ni Fallor) in viero, postquam illud
InGrENI SunE: uti in radiis ckzkC, birib, ah a ha incidencibus ac
, 9, P, ec inter k ec Z, i e y, h e a incurratis, delincatum cAt.
gitur ob analogiam qua est inter propasacionem radiorum lucis
ec proeressum corporum, visum est Propoliriones sequentes in utiis
Opticos subjungere; interea de natura radiorum (uerum (INE COr-
Pora necne) nihil omnino disputans, (ed Prajectorias corporum
rajectorus Lachorum persimiles Tolummodo decerminans.
PROPO.
s
d
C
d
..
L TBEK
PRIMISI
NIITTHITIIEMTITEILIIMIHHIIMIIMIIMHIBIEMLSHILWIHIEMEINAMIIIN