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# Title: [Johannis Wallis S. T. D. Geometriae Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica] Johannis Wallis S. T. D. Geometriæ Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica (shelfmarks Leibn. Marg. 100:1/2, Stück 1; Leibn. Marg. 100:1/2)
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Cap. V I.
et quod quae divertis ejusdem subjacentis cigni punctis sustinentur rigna in-
cumbentia; sint, illic, ad casdem partes polita; hic, ad concrarias.
A Sccunda rero, in hoc porissimum dittert, quod, quae ad contrarias partes sub.
jecti eigni jacent tigna incumbeneia, applicentur illic ad idem subjecti cioni pun-
ctum medium; hic vero, ad dirersa puncta, quibus cieni dongicudo critariam se-
CatuIT.
Duarca, Oninta, e Sexta, Cimiliter ex figura crilatera Hig. 247. derirantur; ut,
ex quadrilacera tr. 246. derivantur prima, secunda, et terria.
Forma Ouarta, quam exhriber Hi8. 25F. Cst analosa Perrix; mutatis Quacratis
(propter angulos non rectos) in Priangula e Fexagona.
Forma Ouinta, quam extribet E3. 252. Cs magis analoga primae; propter duo
eigna incumbentia, 2d easdem partes cioni sustinentis polira: In hoc autem cum
sccunda convenit, quod ad idem tultmentis punctum medium, applicentur u-
crague.
Forma Sexta, quam exhibet fig. 253 est Secundx plane analoga; propter in-
cumbentium ad concrarias parres tignorum caxica, eodem subjecti rioni puncto
medio suftusta: Acque in hoc poristimum a Ouarra diftere; quod hic, ad idem
sustinentis punctum applicantur ucraque; illic, ad diversa. In Schemate autem,
necesse hahui cignorum capira ampurare, paulo cirra rigni Fultinentis puncta me-
dia, (quibus luttulcienda inrellisuntur:) Ouippe alias, cocuncibus ad idem pun-
ctum tionis concrariis, una tierer continua recta, nec ad oculum paterer rigni tu-
Sinentis ab incumbencibus distinctio, nisi rellem in majori Forma Schema deli-
neare (ur in Fx. 2.48. Factum est) quo pollinerienorum oppoticorum capica sulti-
nentis medio disterminari.
POTTunE autem HX FOrmX (sieut pracedentes) plus minutre concinuari, prout
opus ext, acque expedire ridebitur.
Polluncque, qua lingulis incumbune juncturis ancra sustinenda, similiter ad
calculum rerocari, ut ad Formam primam et secundam factum est.
Sed et aliis mille modis Dollunt hxec omnia variari, prour rel conditio loci, vel
scopus Archirecti postularerit. Nobis, haec pauca Custiciat extibuisse specimina,