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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de MAGNETE.
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vit 5 primas oſcillationes intra 20?</
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<
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xml:space
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39?</
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<
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<
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<
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<
s
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xml:space
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">cujus pondus 57 granorum abſolvit 5
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vibrationes intra 18?</
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<
s
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<
s
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intra 52?</
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<
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<
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<
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</
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<
s
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<
s
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xml:space
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<
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<
s
xml:id
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echoid-s5312
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xml:space
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">cujus pondus 56 granorum abſolvit 20
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vibrationes intra 1?</
s
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<
s
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echoid-s5313
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xml:space
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">, 14?</
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<
s
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echoid-s5314
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xml:space
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">. in alio tentamine 10 vibrationes intra
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40?</
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<
s
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xml:space
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<
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xml:space
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<
s
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echoid-s5317
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xml:space
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">. in alio tentamine 20 vibrationes perfecit
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intra 1?</
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<
s
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echoid-s5318
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xml:space
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">, 13?</
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<
s
xml:id
="
echoid-s5319
"
xml:space
="
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">. in alio tentamine viginti vibrationes deſcripſit intra
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1?</
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<
s
xml:id
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xml:space
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">, 16?</
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</
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<
s
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xml:space
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">6°. </
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<
s
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echoid-s5323
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xml:space
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">Acus 9 pollices longa, cujus pondus 95 granorum abſolvit
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10 vibrationes intra 1 Minutum, in alio tentamine in 56?</
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</
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<
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<
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<
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xml:id
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xml:space
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<
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xml:space
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">cujus pondus 205 gran. </
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<
s
xml:id
="
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xml:space
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">abſolvit 5
<
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vibrationes intra 54?</
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>
<
s
xml:id
="
echoid-s5330
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xml:space
="
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">. decem vibrationes intra 1?</
s
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<
s
xml:id
="
echoid-s5331
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xml:space
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">, 46?</
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<
s
xml:id
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xml:space
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">. quindecim
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vibrationes intra 2?</
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<
s
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="
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xml:space
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">, 39?</
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<
s
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xml:space
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<
s
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echoid-s5335
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xml:space
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<
s
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">. triginta
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vibrationes intra 5?</
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<
s
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<
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</
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<
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<
s
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xml:space
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<
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xml:space
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<
s
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xml:space
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">5 linear. </
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<
s
xml:id
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echoid-s5342
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xml:space
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">ponderis 30 granorum abſolvit 5 vi-
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brationes in 35?</
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<
s
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xml:space
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<
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<
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<
s
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">Obſervamus in hiſce Experimentis anomalias, illis ſimiles, quas
<
lb
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in Acu Inclinatoria notavimus, æque multæ enim vibrationes non
<
lb
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abſolvuntur ſemper eodem tempore, ſed diverſo, etiamſi inter
<
lb
/>
tentamina repetita nequidem horæ quadrans interceſſerit, quia vero
<
lb
/>
pendent oſcillationes hæ â vi directrice Magnetica, quemadmodum
<
lb
/>
in Acu Inclinatoria, erit maxima hujus virtutis perpetua inæquali-
<
lb
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tas, uti ſupra indicavimus: </
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<
s
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xml:space
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">cæteroquin videntur eſſe Quadrata tem-
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porum, quibus vibrationes duarum Acuum variæ longitudinis ab-
<
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ſolvuntur, in ratione compoſita ex directâ longitudinis & </
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<
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tis. </
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<
s
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">ſive maſſæ.</
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<
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</
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<
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<
s
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xml:space
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">Nam Acûs 9 pollicum, ſive 108 linearum, pondus fuit 95 gra-
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norum, hi duo numeri per ſe multiplicati, dant 10260: </
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<
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</
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<
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xml:id
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<
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</
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<
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<
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xml:space
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">: 3600, 11135 {115/171}. </
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<
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xml:space
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</
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<
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xml:space
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<
s
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xml:space
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tiplicata dant 31570. </
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<
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