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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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drithmetica En Euitorum.
rioram. L Parscer de quoeris circulacionibus judicanctum est,
habica semper numeri circulacionum consideracione.
DROP. ZZVII. Corollarium.
T autem Spiralis ultra circulationem primam sed
non duabus inceeris continuetur, sigura spiralis sic
descripta (bis sumpto quod bis describitur) a
quabitur trienti tam inteeri circuli contermini, quam e
jusdem continuationis supra circulum inteorum.
Nam incerea dum delcribicur figura (piralis MATM, de
Ccribicur eriam Eigura circularis aucta PPTM: nempe circuluS
inceger De, cum adjuncto cciam sectore PMT.
PROP. XXVIII. Corollarium.
E Dariter, se spiralis continuetur per circulatio-
nes duas tres, quatuor, aut plures inteeras, cum
additamento; ficuraspiralis sic descripta (repeti-
ia tolies qualibet parte quoties describitur,) aqnabitur
trienti tam inteeri circuli conterminibis, ter, quater, aut
sapius sumpti (pro numero nempe inteerarum circulatio-
num,) quam etiam additamenti sive sectoris adjuncti.
Ouia nempedum Egura illa (piralis (a circumducta recta
crelcence) delcribitur, cories delcribicur, Ca recta circumdu-
eta aquabili) circulus concerminus, acq; insuper addicamen.
tum.
PR OP. XZIZ. C010H.
F9i insuper. Pienre spirales quae prima, que
prima e secunda, quae prima, secunda e ter-
tia, qua prima, secunda, tertia et quarta, Ce
sic deinceps) circulationibus describuntur, Cput a M AM,
MaBML, AIABCMI, MABCDM, C c. ) se habent ad invi-
Cem ui numerorum drithmetice proportionalium cHbi, I.
E C Z
B
PROP: 27, 28, 29.