Stevin, Simon
,
Mathematicorum hypomnematum... : T. 4: De Statica : cum appendice et additamentis
,
1605
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AD LECTOREM
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<
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">QVandoquidem nonnullis bujus Praxis
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propoſitionibus de corporum motu dictu-
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riſumus, paucis priuſquam in rem ingre-
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dimur lectoriaperire viſum fuit Stati-
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cem duntaxat potentiæ moventis & </
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derismotiſitus æquilibritatem ſeu æqua.
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</
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<
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">mentum docere; </
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<
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">quanta verò moventis
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potentiæ vis præterea deſideretur, (nam
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cuilibet movendoimpedimentũ ſola cogitatione tantũ ſepar abi-
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le perpetuò inbæret, quod & </
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<
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">ipſum ſuperari quoque neceſſe eſt,)
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quò datum pondus commoveatur & </
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<
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">impellatur, à Staticæ do-
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ctrina alienũ fuerit; </
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<
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<
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">ratione mathematica iste po-
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tentiæ exceſſus invenirineque explicari poſsit, etenim impedi-
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menta & </
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<
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">res mot æ constantem analogiam nullam babent. </
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<
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rùm quò ratio iſta ſit magis perſpicua, eſto currus gravitatis
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notæin cognitæ acclivitatis collem pertrabendus. </
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<
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">Ajo ſtaticam,
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ut 4 exemplo 9 propaſ. </
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">docere quæpotentiaſit currui
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æqualis, boc eſt, ſitu æquiponderet non habita motus aut impe-
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dimentorumratione, cujus generis ſunt illa ſingularium par-
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tium ut axium in ſuis ſyringibus, rotarum in plateis, ac deni{q́ue}
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totius currus in aere. </
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">Impedimentorum inquam potentia cum
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catholica non ſit à ſtaticæ præceptis rejicienda, quia eius ad po-
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tentiam moventem ratio unica & </
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<
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refutatis eorum argumentis qui in ponderibus deprimentibus
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ſecus ſtatuunt, arguerem, niſi in ſtatica tantum doctrinæ præ-
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cepta instituere ſatius ducerem, alibi priſtinũ & </
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de ponderũ affectionibus errorem firmis rationibus retecturus. </
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Cæterum æquilibritatis cognitio hic ſufficit; </
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bræ utrâque lance tantundem ponderis collocetur, quamvis
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librile ſeu jugum ſua habeat motus impedimenta, levi tamen
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momento lances huc at que illuc impelluntur: </
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<
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omnibus evenire certum eſt.</
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