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# Title: [Johannis Wallis S. T. D. Geometriae Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica] Johannis Wallis S. T. D. Geometriæ Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica (shelfmarks Leibn. Marg. 100:1/2, Stück 1; Leibn. Marg. 100:1/2)
# Folio 814, page id 851387705:0834
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18.
De Caiculo Centri Cravitatis. Cap. V.
HA Sustre VdiC C, il 51∞03 I,
Denique; que de Cxeloide primaria jam cradidimus omnia, cadelu all decun-
curias facile transselureur, quas Procractas Contractasque pDellaME. si
0
vire ct
Cycloidem vero Primariam illam dicunt quam tractenus descriplimus; Ouam
Seilicet volventis circuli Punctum aliquod in peripheria, describit, dum ipla sibi
Peripheria commenturae in subjecto plano aequalem rectam rar; Fjulre C en-
erum rectam de
Si vero recta cCC, quam Centrum describit dum circulus unam convertionem
tacie, seu guxe huic tubest in plano rar, quam Cycloidis Balem dicimus, Major
fuerit quam Circuli Cienicoris Peripheria, Procractam dicimus Cyeloidem; ut r L r
f18. 275. Si MinOr, Contractam, UL TF T.
Dumque Circulus ADa aliquo peripherix sua puncto, deseribir Cyeloidem
Minoris correspondens punctum describit Cyeloidem Protractam ut 7I, H8. 276.
Concentrici vero Majoris cujusque punctum correlpondens, Contractam delcribie
UE FE. Ouarum quidem Cyeloidum Protracta Contractaeque Genitores, sint illi
Minor, Majorque Circulus.
Ouxe aucem de Creloide Primaria craduntur omnia; eadem Secundariis accom-
modancur; cum hoc dilerimine, Duod, cum in Primaria rectae bB linc ipsis Cc.
nicoris Cui arcubus BA Aquales; in Protractis, Majores Func; in Contractis
Mtinores; quam suorum respectire Genitorum Correspondentes arcus B A; de qui-
dem
B24
hine
DEr2
d1I
32t
1