Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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421 - 450
451 - 480
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MATHEMATICA. LIB. I. CAP XII.
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libræ, huic extremitati applicatum ſuſtinet pondus P.</
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<
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<
s
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">Plurimi orbiculi utcunque conjungi poſſunt, & </
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<
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annecti; </
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<
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">ſi tunc unum extremum funis fixum ſit, & </
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<
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circumeat omnes orbiculosillos, & </
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<
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">fixos æquali numero, par-
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vâ potentiâ magnum pondus elevari poteſt; </
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<
s
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">in hoc caſu quo
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numerus orbiculorum ponderi conjunctorum major eſt, (fi-
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xis enim actio potentiæ non mutatur ) eo minor
<
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xml:space
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valet ad ſuſtinendum pondus; </
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<
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">& </
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<
s
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xml:space
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">potentia, quæ eſt ad pon-
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">195.</
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dus, ut unitas ad duplum numeri or biculorum, cum pondere æ-
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que pollet.</
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<
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<
s
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xml:space
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">Hic enim eſt numerus funium, quibus pondus ſuſti-
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netur, & </
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<
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<
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2.</
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<
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<
s
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xml:space
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">Pondus P ſex librarum regulæ AB annectitur, in quatres
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">196.</
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orbiculi libere rotantur. </
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<
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fig. 2.</
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& </
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</
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">alteri extremo pondus unius libræ alligatur, & </
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librium,</
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<
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3. & 4</
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s
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xml:space
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">Non intereſt quomodocunque orbiculi conjungantur; </
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<
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xml:space
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">ad
<
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">197.</
note
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elevanda pondera haud facile præcedens diſpoſitio adhibetur;
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</
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<
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">artifices ideò inæqualibus orbiculis utuntur diſpoſitis ut in
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fig. </
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">; magnitudo enim orbiculorum nihil immutat. </
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<
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fig. 3.</
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etiam, quæ diſpoſitio eſt omnium maxime compendioſa,
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orbiculi circa eundem axem volubiles ſunt, ut in fig. </
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fig. 4.</
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in hiſce duobus caſibus experimentum eodem modo proce-
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dit, ac in 2
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experimento.</
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</
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<
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<
s
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xml:space
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">Quando extremitas funis ductarii, quæ in experimentis
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præcedentibus fixa eſt, annectitur ponderi aut orbiculis
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fig. 5.</
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mobilibus, ratio potentiæ ad pondus non eſt ut 1. </
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<
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plum numeri orbiculorum ponderi affixorum; </
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<
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augeri debet numerus hicce duplus; </
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<
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<
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">hîc, ubi duo orbicu-
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li ponderi annectuntur, ratio eſt ut 1 ad 5; </
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<
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tur funes, quibus pondus ſuſtinetur.</
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<
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5.</
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<
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<
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">mobiles, habentes ſinguli
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fig. 4.</
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