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# Title: De Locis Solidis Secunda Divinatio Geometrica (shelfmark Leibn. Marg. 151)
# Folio 101, page id 898203430:0293
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VARIAR DISPOSITIONOM LIMIT. L. IB. III.
101
sam quacratum ordinatae L. I in quadeante AB FD aequatur  dif-
ferencia inter quodrarum dacx A B, dc quadratum segmenti AI.
A Per PEOP
30. lib. 2. hu-
Ouadratum vero ordinata lO in semiparabola F. OC, cujus Foeus jus.
est B aequatur differentiae incer quadrata AI, IB segmentorum da-
Ex AB: sed cum lic (ob hanc diasonalem harmonicam BOD) FTY B DEF PrOP.
33. lib. 2. lV-
ad IL, DE MI ad IO. _ permutando HI I 3a IMI, WEL l ad IO, erie jus.
quoque quadratum FII, ad quadeatum lM, sire quadeatum AD ad
IM, sive quadracum torius darae AB, ad quadrarum lui legmeneimi-
noris BI, uc quadracum L lad quadratum (O; Hoc est uc differen-
eia incer quadrara datxe AB, ee lui legmenei majoris AI, ad differen-
eiam incer quadrata suorum legmeneorum inequalium AI, IB.
OuaprOpter data A B secta est in I in duo sesmenta inaequalia
AI majuS, de lB minus, sic, ue quadearum majoris AI sic medium
harmonicum, inter quadrara rorius dacx AB, ee legmenei minoris BI.
1d quod est idem ac dicere datam A B sectam ese in P, sCCUH.
duni mediam, e exrremam rationem harmionieam quadratorum.
Ouod crae Faciendum.
FE haec pro incerim de cribus his Medieratibus dicta Fusticiane.
Exererum (quum Cuaristimo Sornemr Doner jussui, receptohae
die vigelima quarra Novembris currentis Anni, 1674. parere de-
beam, ee ue lape accidie, lonse ab Uebe per plures Forrasse an-
nos immorari, adeoque impressioni praelentis Operis Coniei hoc
Libro Tercio Anem ponere cogar) ne lequentes Pagine vacent,
has dumscaxat liceae mihi peculiares Arres adjicere ad Secliones
Conieas (quas ue plurimum in ipso depiximus mechanice per
reculam, se circinum) expedire delignandas, luis tamen geon
metricis demonstrationibus hoc in Volumine altariS, CONFIRMALAS:
tic primo (’ex daco verrice, ec F0co) Sectionem parabolie, quam
deseribere oporruit in praecedenti Problemaie decimotercio.
l  2 ta 1.
t. AL
ata recta AB pro semirecto larere desoribendae Pa-
rabolae; per verricem B, e circa. productum axem
BC ipsam in plano ope circini, e regulae, per puncta
concinuara describere.
EOper BC exciletur per B perpendicularis B D cui aequidistan-
D cec dueaneur quorcumque recte C F, intra iplam BD; e
polito culxide cruris circini in a, incervallis lingulis AC, AC,
AanE Eotidem aECUS CD, CD, primam normalem BD sCCANEeS
in D. D: Porea vero. polico culpide in B, incervallis lineu.