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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 140, page id 1677894601:0320
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=320
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C14C
Sectionum Conicarum proprietates praecipuae +
sionem Conica. Ceometris paltim traduntur. Fit consimiles Tunt pro.
rum competunt Pletates Currarum secundi generis ∞ reliquarum, ut
Ex LequenEI PTOPPIETatUM PPAeCIPuaTUM enueIa-.
tione constabit.
Nam si rectae plures parallelae _ ad conicam se
cundi generis olonem uErinq; terminatae ducantur, recta duas Ca-
dinatae, Diame- Lam Bisecans bilecabit alias omnes, ideog; dicitur Dia-
meter tiourae _t rodeae bilectae dicuntur Ordinatim ap
plicatae ad Diametrum, e concurtus omnium Dia-
metrorum est Centrum hourae, _ interlectio C urvae dt
diametri V’ertex nomimatur, e diameter illa Axis
eAt cui ordinatim applicatae insictunt ad angulos ic-
ctos. Ft ad cundem modum in Curris secundi se-
BerIS, A rectae duae quaeris parallelae ducantur Occur-
rentes Currae in tribus punctis: recta quae ita secat
tras parallelas ut lumma duarum partium ex uno se
cantis latere ad curram terminatarum aequetur parti
Tertiae ex altero latere ad curram terminatae, codem
modo lecabit omnes alias his parallelas curraeq; in
tribus punctis occurrentes rectas, hoc est, ita ut lum-
a partium duarum ex uno ipIIs latere semper
cequetur parti tertia ex altero latere. LlaSItaq; FreS
partes quae hinc inde aequantur, Ordinatim appli-
catas et rectam lecantem cui ordinatim applicantur
Diametrum _ interlectionem diametri 8 cuerre V er-
ticem e concurtum duarum diametrorum Centrum
nominare licet. Diameter aucem ad Ordinatas re-
etanoula simodo aliqua lit, etiam Axis dici potest,
ex ubi omnes diametri in eodem puncto concurrunt
iAud erit Centrum generale.
lyper
Proprietates Se-
curr
superiorut
senorum.
Curvarum se-
tri Vertices, Cent
ra AXC