Stevin, Simon
,
Mathematicorum hypomnematum... : T. 4: De Statica : cum appendice et additamentis
,
1605
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DE C*HALINOTHLIPSI.*
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eſt, vis manus C clariores effectus habet in ſcapo A D, quam in ſcapo A B
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per converſam 24 prop. </
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<
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">quia hæc minus attentum fallere
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poſſet tanquam expoſitæ propoſitioni contraria ſciſceret, monemus ut anno-
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tatiunculam 2 propoſitionis adeat, indeq́; </
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<
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<
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xml:space
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">Nõ enim in hoc theo-
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remate quæritur quantanam ſit potentia manus C, ſed ſi manus utroque caſu
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æqualiter attollatur (quamvis ſub angulo A B C ei magis ſit allaborandum,
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quam ſub angulo A D C) uter ductus tum plus aſperitatis habeat.</
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">Ad eam quam rettulimus aſperitatis cauſam nonnunquam & </
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<
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<
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">ut quanto annelli contactus ad equi pectus propius adducitur,
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tanto in frenis, quales vulgo fabricant, intermediæ catellæ pectori quoq; </
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viciniores; </
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">Sed cum jam eo adductæ ſunt ut pectus tangant, poſl
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ea freni du-
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ctus aſperitatis amplius nihil habet. </
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">quamvis enim deinceps plus annitaris
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omnis plaga equi pectore avertitur, neque mento mandibulæve impreffio va-
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lidior ulla infertur. </
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">Sed ſiannelli contactus, atque ideo quoque intermediæ
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catellæ longius à pectore abſint, conſequens eſt ſcapos longius retrorſum pe-
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ctus verſum adduci poſſe ut catellæ intermediæ pectus non tangant, unde
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major aſperitas exiſtit. </
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catellæ intermediæ neutro modo pectus contingant.</
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">Nonnulli equi (quorũ deformationem hic vides) caput ſurſum jactãdo ſeſe
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frenorum preſſuræ eripiunt, neque tum illorum tenacia infrenari poteſt, ſed
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equitem invitum rapiunt: </
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">cum tamen annelli contactus eo ſitu longius à pe-
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ctore abſit, ideoq́ue frenum eo caſu aſperitate ſua plus moleſtiæ faceſſere de-
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beat. </
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">Verum objectiunculam illam facile eſt diſſolvere, nam cum tenſa habe-
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na A B parallela erit lineæ imaginariæ ab annelli cõtactu A ad lupiaxiculum
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C eductæ, quemadmodum in hoc diagrammate notare potes, tum quan-
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topere annitaris ductu habenæ capitellum ne hilum quidem commoveris,
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neque pſellium elevâris, ideoq́ue omnis aſperitas conciderit nam quamvis
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lupus retrorſum adducatur, inde tamen ſupraſcriptæ aſperitatis cauſa non de-
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pendet. </
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mentius habena tum adducetur, tanto pſellium magis remittet. </
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miſſo theoremate exceptio haud dubiis, aut obſcuris rationibus nitatur.</
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