Monantheuil, Henri de
,
Aristotelis Mechanica
,
1599
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enim quantum ventus exempli gratia dextrorſum propellit nauim:
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tantum vi ſua gubernaculum cum nautis ſiniſtrorſum illam tor
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quet, ac rapit. </
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">Et ita neutra ex contrarijs viribus præualente, eò fer
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tur nauis, quò vult gubernator, etiamſi ventus minime ſecundus ſit.
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.]
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Ex hoc loco colligi poteſt cauſa, propter quam
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quotidie naues obſeruantur non citra admirationem eodem vento in
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contrarias partes nauigare, vt & Plinius etiam recitat. </
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">Iiſdem
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ventis in contrarium nauigatur prolatis pedibus ( hi ſunt funes de
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quibus ante ) vt noctu plerumque vela concurrant. </
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">Hoc autem vt
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fiat geometricè demonſtratur.
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Sint naues A tendens ad G, & B tendens ad H. </
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>ventus ex
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C recta feratur ad D, tanquam ad centrum. </
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pulſa nauis A, feretur in E, & B in F. </
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">Fiat igitur in naui per
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temonem mutatum angulus G A K, qui ſit æqualis angulo G
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A E: tum H B L æqualis angulo H B F.
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Quia igitur nauis A à vento fertur in E, & per temonis muta
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tionem in K, feretur recta in G, & eadem ratione B in H.
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">Neuter enim cum ſuo impulſu præualeat, medium teneat A G ne
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ceſſe eſt, quod ſi ventus præualet, adiungitur remigum renixus, qui
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ſi non ſatis ſit, vento cedendum, aut anchora iacienda. </
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<
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">Tum autem
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vix remiges reſiſtunt,
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nauis eſt in centro, vel radio perpendicula
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ri venti, quo in loco propter vim venti maiorem, & anguli per te
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