Monantheuil, Henri de, Aristotelis Mechanica, 1599

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1 41[Figure 41]
Remus in principio motus habeat
poſitionem
A B C, ducaturque per
punctum
C, in quo remi palmula
recta
C G rectos efficiens angulos
in
puncto G cum recta per quam ad
motum
nauis ſcalmus B mouetur.
Et
eadem
recta C G producatur vſque
ad
E, ita vt G E ſit æqualis rectæ
B
A ( quæ eſt dimidium remi ) rur­
ſus
per punctum B ducatur recta Q
B
F ad rectos cum ipſa B G, & in
Q
B F incidant perpendiculares A
Q
C F.
Quoniam igitur triangu­
lorum
A B Q & F B C anguli,
qui
ad B ad verticem oppoſiti ſunt
æquales
, prop. 15. lib. 1.
& anguli qui ad Q & F recti ſunt, tum
latus
A B lateri B C, ſunt enim dimidia remi, æquale eſt, erit &
latus
A Q æquale lateri F C prop. 26. lib. 1.
Ipſi autem F C recta
B
G, latus parallelogrammi oppoſitum, æqualis eſt prop. 34. lib. 1.
A Q igitur erit æqualis ipſi B G ax. 1. Atque tantum ſpatium B
ſcalmus
: quantum nauis.
ex antec. Et nauis tantum confecit quan­
tum
A caput remi ex hypotheſi.
A autem conficit ſpatium A q.
Igitur B ſcalmus conficiet ſpatium B G. Et quia anguli ad G
recti
ſunt, ideo cum ſcalmus peruenerit ad G, habebit remus A C
rectitudinis
ſitum E C, quo in loco illius remigationis finis erit.
Sic
igitur
palmula C à loco ſuo dimota non fuit, quod demonſtrandum
erat
.
Cæterum Nonius hîc aduertit rectam G C minorem eſſe B C
remi
dimidio, pro quantitate C T.
Vnde concludit quo tempore
ſcalmus
B transfertur in G, palmulam quidem C excurrere in
ipſam
longitudinem C T.
Sed neque antrorſum neque retrorſum,
quod
Ariſtoteles puto vocauit antè, palmulam diuidere mare, quod
ſolum
demonſtrare intendebat.
vbi etiam aduertes lector ex hoc dia­
grammate
Nonij & cæteris lineam A L E à capite remi in hac
remigatione
deſcriptam, non eſſe ſimplicem arcum: ſed duos, vnum
A
L ex motu proprio remi circa B centrum: alterum L E ex motu
conſequente
ſcalmi B motum.
quod pulchrè conſentit cum his quæ

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