Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

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1AB, lineam oſtendit
41[Figure 41]
circa cuius prin­
cipium guberna-­
culum applicatur,
ac primo attingit
temonem, quæ li­
nea in motione
gubernaculi ma-­
net immota, ſicut
ſcalmus in motio­
ne remi.
Pars ve­
rò AC ſignat fa­
ciem dexteram
temonis; & AD
manubrium gu-­
bernaculi.
Quod
ſi extremum ma­
nubrij D, intelli­
gatur transferri in
E, vt cernere eſt
in ſecunda figura:
tunc ait Ariſtote­
les, illuc transferri
etiam centrum A.
Nam D tranſlato in E, ſimul C transferretur in F;
ac per impulſum acceptum in latitudine AF neceſſariò
A transferri deberet ad partes G.
Cumque ſimul naui­
gium, cui temo eſt alligatus, procedat antrorſum, ipſum
A non conſtitueretur in G, ſed in E, vbi prius erat ma­
nubrium gubernaculi.
Quare gubernaculum nihil naui­
gio ad id, quod in ante progredi eſt, conferre ait Ariſto­
teles, ſed ſolum puppim in obliquum pellere, aliquantu­
lum ſcilicet ad latus, qua parua motione puppis, pro­
ra in contrarium vergit, nempe ad latus oppoſitum, vt
ipſemet Philoſophus docet, & conſiderare licebit in hac

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