Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

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Sic autem explicato principio, ac inſtrumento vtriuſque
motionis
, explicat Ariſtoteles modum, quo procedit ſecun­
da
motio à nobis propoſita, quæ potiſſima eſt, & maioris
longè
momenti quam prima: aitque temonem (quem cum
gubernaculo
ſæpè confundit) non accipere mare ſecundum
latitudinem
nauis, ſeu quod ad latera nauis eſt, eo modo
quo
accipit remus, depellendo illud retrorſum, vt per repul­
ſum
inde acceptum, nauigium feratur antrorſum, quia nihil
temo
nauigio confert, quo ad motum antrorſum, vt in fine
etiam
quæſtionis idem Philoſophus animaduertit: Sed ac­
cipere
mare commotum, quod illi obuiat ſecundum longi­
tudinem
nauis à prora in puppim.
Nam qua parte temo
vergit
foris, matique eius ala obuertitur ad alterum latus na­
uigij
, mare ſecundum longitudinem nauis ei obuians exci­
pit
intra angulum, quem cum naui conſtituit.
Excipiendo au­
tem
illud vim patitur in contrarium, tollereturque niſi fulciretur
in
cardine.
Cum igitur nec auferri poſſit à puppi, nec retro­
cedere
in directum contra curſum nauigij, hinc fit, vt cedendo
ſaltem in parte quoad poſitionem, quam prius habebat, nauem
ipsam inclinet obliquè; ſiqui­
37[Figure 37]
dem
dimoto vno latere an­
guli
à ſua poſitione, alterum
dimoueri
neceſſe eſt, cuſpi­
de
manente in eodem ſitu.
Quod ſic poteſt amplius
explicari
.
Eſto nauis AB;
cuius
puppis A, prora B, te­
mo
verò AC obliquè con­
ſtitutus
ad ſiniſtram, ac ſuf­
fultus
in A, vbi eius cardo
ad
puppim poſitus eſt, &
vbi
angulum efficiat cum longi­
tudine
nauis, qui ſit BAC.
Deinde mare obuians incidat in ipſam AC. Tunc dicimus

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