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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. 107:
Prithmetica Insinitorum.
bice inleripcum, ex e ad  4 Y + = = = 3. (DEFPCOF
Nempe ocrobiq; racio plusquam intinita.
SCHOLLVM.
Acque ica problema illud (ingeniolum quidem, et non pau
eis mirandum,) quod Porricellius in una Reura Colida praecti-
Cic, (puca, Solido FI, perbolico aucto in intinicum concinuaco, aequa
le cylindrum consticuere) nos in aliis innumeris fipuris tam
planis quam Colidis Cprxcedentibus lex propositionibus con-
cinvis) praesticimus. Puca, Fipuris innumeris specie differentibus, tam
planis quam solidis, interminaris, aequales fieuras terminatas (vel Calcem,
quod cancundem ralec, in coenica racione contticutas) exhibere.
Consulcius Forcastis esser, (si can um aucupanda Fama ope
ram derem,) celaca methodo qua huc pervencum eA, Paucas
aliquoe parciculares propoliciones (canquam admirandum
quidpiam auc Ruvendum) demonstracionibus apapogicis oAten- si talis huburiter
disse. ound receres olim non raro tecille, plane lulpicor; qui illud
Expius sibi videncur propoluisse, uc iplos alii admirentur pocius
quam incalligant; lalcem uc illis eorum ettacis assentum concti
praebeant, potius quam uc genuinam problemaris inrestigatio
nem incellisanc. Rcquehinc factum esse credo, quod corum
Aualycice (quam quidem splos habuisse ex mulcis iptius, in de-
mostracionibus eorum non paucis, vectigiis lacis liguet) Potteros
Fere penitus lacueric; (exirua enim plane parsilla est qua apud
Diophancum ex(ar, si ad cxregia illa quo ipti perrenerune in-
VeNCA COmPATETUE:) CEnecesse habuerine praeleneis aeri mache.
maciei (Viet Ouchiredus. Tlarriocus, Chetaldus, C avallerius, Terre-
cellius, Charresius, aliique maeni riri) vel novam excoBicarE,
rel anciquam Calcem (conclamaram plane et penitus ignora-
cam )de novo relulcitare; quod quidem eo luccessu praesicerunt,
ue nottram nunc dierum Analycicen, vecerum ictam, tanta Ce-
persicione celacam, aeguare lalcem vel superare pocius nullus
dubicem.
Verum efgo mallem libere philolophando, Fontes ip(o12.
perire, ur eadem opera possic lector e propolicionum demon-
craciones e methiodum qua iltuc pervenerim perlencilcere;
unde e iple possic proprio marre ejulmodi aliaa innumeras
invettisare, quas cgo (ne cxdio sim) lubens Praeterco, concen.
cus co disicum incendisse, unde alii alis moctris similia pro libicu
depromine