Musschenbroek, Petrus van
,
Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae
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CORPORUM FIRMORUM.
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amputatæ fuerunt extremitates, manſeruntque longitudines modo,
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7 pollicum. </
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<
s
xml:id
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echoid-s14056
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xml:space
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">Tum ne â tremoribus ſoli, excitatis ab equis, curru-
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bus, aut hominibus Experimenta turbarentur, in tempus delata ſunt
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nocturnum: </
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<
s
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echoid-s14057
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xml:space
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">Priſma Triangulare immiſſum fuit foramini inſculpto
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Ligno Quercico, cui accuratiſſime congruebat, cujus baſis quo-
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que erat horizontalis; </
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<
s
xml:id
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echoid-s14058
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xml:space
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">facto Experimento, ponderata fuit pars pris-
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matis, quæ prominebat antea, ponduſque hoc ex centro gravitatis
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ſuſpenſum fuiſſe conſiderabatur, ut momenti haberetur ratio: </
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<
s
xml:id
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echoid-s14059
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xml:space
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">even-
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tus hi fuerunt in Priſmate Trigono.</
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<
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</
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<
s
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xml:space
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">1°. </
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<
s
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echoid-s14062
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xml:space
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">Ad diſtantiam 3 pollicum Rhenol. </
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>
<
s
xml:id
="
echoid-s14063
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xml:space
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">â foraminis orâ fractum
<
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fuit priſma a granis medicis 4219.</
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<
s
xml:id
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echoid-s14064
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xml:space
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</
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<
s
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echoid-s14065
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xml:space
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">2°. </
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<
s
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echoid-s14066
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xml:space
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">In alio tentamine ad eandem diſtantiam a foraminis orâ ge-
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ſtare tantum potuit 4204.</
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<
s
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<
s
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echoid-s14068
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xml:space
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">3°. </
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<
s
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echoid-s14069
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xml:space
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">In tertio tentamine ad eandem diſtantiam â foraminis ora
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rumpebatur a granis 4200.</
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<
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echoid-s14070
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</
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<
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echoid-s14071
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xml:space
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">4°. </
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xml:space
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">Ad diſtantiam 4 pollic. </
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<
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xml:space
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">Rhenol: </
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<
s
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xml:space
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">a foraminis orâ geſtavit non
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plus, quam 3169 grana.</
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>
<
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xml:space
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<
s
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echoid-s14076
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xml:space
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">5°. </
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<
s
xml:id
="
echoid-s14077
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xml:space
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">In repetito tentamine ad eandem diſtantiam 4 pollic. </
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<
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xml:space
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">Rhenol:
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</
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<
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xml:space
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">tulit 3180 grana.</
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</
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<
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<
s
xml:id
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xml:space
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">Firmitatis diſcrepantiam candide memorare malui quam ſilere,
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videtur aliquomodo pendere ab arctiori vel laxiori complexu fora-
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minis, cui vitrum immiſſum fuit; </
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>
<
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xml:space
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">forte quoque a profundiori in-
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tromiſſione: </
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<
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xml:space
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">forte non eſt æque cohærens in omni parte vitrum:
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</
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<
s
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xml:space
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">Tranſeamus ad Experimenta cum parallelopipedo facta, hoc im-
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miſſum fuit foramini quadrangulari in Ligno Quercico, atque ſem-
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per obſervatum fuit; </
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>
<
s
xml:id
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xml:space
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">ut latus K M eſſet interius, atque horizonti pa-
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rallelum, tum habita quoque fuit ratio momenti ex gravitate propriâ.</
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xml:space
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</
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<
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xml:space
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">6°. </
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<
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xml:space
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">Parallelopipedum ad diſtantiam 4 pollicum a foramine fra-
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ctum fuit a granis 13293.</
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</
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<
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<
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xml:space
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">Tentamen repetitum dedit grana 13279.</
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<
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xml:space
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<
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xml:space
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">Ad diſtantiam 3 pollicum a foramine fractum fuit â granis
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17708.</
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<
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</
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<
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<
s
xml:id
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echoid-s14096
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xml:space
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">Sunt hæc omnia Experimenta accuratiſſime inſtituta, omnium-
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que circumſtantiarum cura fuit habita, ita ut tuto iis fidere quea-
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mus: </
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<
s
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echoid-s14097
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xml:space
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">comparemus igitur Cohærentiam priſmatis & </
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>
<
s
xml:id
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echoid-s14098
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xml:space
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">parallelopipedi:
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</
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<
s
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">Priſma in Exp. </
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<
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">1°. </
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<
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<
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">fractum fuit a granis 4219.</
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