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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 155, page id 1677894601:0335
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T1G5)
e inaequales (nam aequales esse nequeunt nili Agura Fis. Si.
sit Conica sectio) figura constabit ex tribus Hlyper-
bolis libi oppolitis quarum una jacet inter alymp-
totos parallelas et alterae duae jacent extra. ft haec
est species quinquasetima septima.
Si radices illae duae lunt impossibiles, habentur IIy-
Derbola duae oppolitae extra asymptotos parallelas et
Anguinea hyperbolica intra caldem. Hlaec figura
duarum est specierum. Nam centrum non habet Fis. 62:
ubi terminus d non deest; sed si terminus ille dec( 18. 63.
punctum A est ejus centrum. Prior species est quin-
quagesima octara, polterior quinquagelima nona.
Duod E terminus ey deest, tigura constabit Cx Fis. 64
tribus hrperbolis oppolitis quarum una jacet inter
aermptotos parallelas _ alterae duae jacent extra ut
in specie quinquaselima quarta, et praeterea diame-
trum habet quae est abscista AB. Ft haec est species
Texagesima.
TIrperbolismus Fllipseos per hanc aequationem de-
XNIV.
tinitur Xy y Y CY = CX ) d, e unicam habet aCymP Mps
toton quae est Ordinata principalis Ad. Si terMInUS Fis. 65.
eynon deect, tixura eAt Fyperbola anguinea sine dia-
metro atq;e etiam sinc centro li terminus d non deest.
Duae species est sexagelima prima.
At Ei terminus d deest, tixura habet centrum sine Fis. 66.
diametro e centrum ejus est punctum A. Species
vero est lexaselima secunda.
tt si terminus ey decst _ terminus d non decst, Fis. 67.
Fisura est Conchoidalis ad atymptoton AC, habetq;
diametrum sine centro, e diameter ejus est AbIciAa
AB. Duae species cst lexagelima tertia.
X
Ll)det.