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# Title: Qua Continentur De Angulo Contactus & Semicirculi, Disquisitio Geometrica. De Sectionibus Conicis Tractatus. Arithmetica Infinitorum: sive de Curvilineorum quadraturâ, &c. Eclipseos Solaris Observatio (shelfmark Leibn. Marg. 84:2)
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PrOD. 4.
drithmetica Infinitorum.
Friangulum enim constac quasi ex intinicis rectis parallelis
Arichmerice proxorrionalibus, a puncto inclioaris, quarum
maxima est basis, Cut ostendimus ad prox, ee 2. libri nostri de
Conieis Sectionibuss) Paralleloprammum aurem ex cocidem
bast aequalibus, (ut pacec: )Er 50 illud ad hoc cA uE 1 ad 2 (ver
Praeced.) Ouod crac demonstrandum.
PROP. IV. Corollarium.
Tem Pyramidoides vel Conoides Parabolicum (sive
erectum sit sive inclinatur,) ad Prisma vel eplindrum
super aegnalibase, aeque-altum.) est act 2 adt 2.
Constac enim Pyramidoides vel Conoides Parabolicum
quasi ex intinicis planis Rrichmerice proportionalibus, a pen-
eto inchoacis, quarum maxima est balis, (uc ostendimus proP.
9. Con. Sect.) Prilma rero vel Cylindrus ex tocidem bali ~
qualibus, (AEDaLCE:) Ergo illud ad hoC uE L ad 2, Per
PFOD.2.
P R O P. V. Corollarium.
Lem Linea Spiralis qualibet MT Ca spiralis Prin- quae d
Ecrpio exorsa) ad correspendentem Peripheria arcum longotudi
3 C
conter. tendit faltadum
Haec omnia
li
vee vel s. accipo
enda ut vult in scolio prop. 13. in
exta.