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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)
# Folio 37, page id 824573315:0121
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Ded
ectionibus conas
ri: u Pacere porerit ex eis quae lupra de parabola dicta
lunc ait1oD. CLSPlacnicisicuolet epo
PROP. 16.
bus (ut in Parabola, Sic , in EIlixsi aliis mensuris ordina.
cim- applicatarum quanticatem determinare, quae c.
andem Kllixiin ubigi comitentur.
Nempepro singulis rectis bD, substimnne Cingulas
AD diametrosinterceptas; que quidem illis. nE
proporcionales.
Pro recta vero A5. Substicuune aliam, puta LA, i. na-
ginariam, (quod Latus Rectum appellanE) que cri-
buS A, BF, DA, St quarta reciproce proportionaIS;
et (IC ubique B. D a AS= -DA = I A. AdcOg; LatuS-FC-
cu LA = ∞+ XAS,_ A5 ∞ LA.
Tum concinuata Diaierro AD doncc oppolito
Triansuli-per. axem cruri occurrat in a, uc hrabeatur
Diameter-eran(versa A23) eric (proprer lumilis trim-
eula) AA. AS:: Da. DS===  AS. Idcoque BD - DS
DO9):
1a+ ASABD =  AIAFDA. (quia nempe
BD= AS=DA. L A, ut dictum et.)
1c
2