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# Title: Francisci Dulaurens Specimina Mathematica Duobus Libris Comprehensa (shelfmark Leibn. Marg. 134)
# Folio 89, page id 1066520976:0109
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LFBER I. C A PUZ
MIONEFUM.
Ouando desmetone 8 angulum esse dixi duarum, plu-
riumre ejuldem speciei magnirudinum, ad unum pun-
ctum collectarum, e non in continuum jacentium bre-
vissimam remorionem, dictum Colummodo pura de lineis,
_ superticiebus, non vero de Colidis, uc in hujus definicio-
nis explicatione aperre declarari. Ideo vero reneralima-
onicudinis voce ulus sum, ut angulos planos, atque soli-
dosunica definitione comprehenderem. Verum si quis
piam magnicudinis nomen male hoc in loco usurpatum
existimer, responsum habeat me perullum aliud conre-
Diencius vocabulum mencem meam explicare non po-
tuisse; sed modo mecum dere consenriat, de verbis nul-
lam licem morebo. Forrasse paucis additis clarior appa-
rebic illa eadem anguli definitio, ita dicaus.
Anculus est duarum, aut plurium, ejusdem (e videlicet
aut 2atudinum ad unum punctum collectarum,
 non in oam jacentium brevissima remotio, sive
cosantia.
APVC OIILOM.
De Elementis Geometricis.
F O NS IN V E N TLO N TS.
De linearum situ, sive de variis linearum inter se
Positionibus.
TNVESTEOATTO.
Ouot modis linearum situs variari possit.
e cesea Conssunsusscus, algue coincidune,
velaliquo a le inticem dictaneincervallo. Tamquae
colacidune, obligua acchario sune inter se, vel per-
pendicutates; qua vero inricem distant, necessario etiam
parallela sunc, vel imparallelX. Onde quaruor omnino
neque pluresneque pauciores disponendarum incer se li-
mearum rariaciones inveniunEur.