Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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dum pondus per omne planum, in plano horizontali facillimè ingens
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pondus moueri poteſt; præſertim ſi plani ſcabrities non impediat motum. </
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<
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">Hinc modico organo ingentem nauim facilè mouebat Archimedes,
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quam ſine organo tota ciuitas non mouere poterat. </
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<
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">Quæres, quot ſint potentiæ mechanicæ? </
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">Reſp. quinque hactenus
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numeratas eſſe, quæ ſunt, vectis, trochlea, axis, cuneus, cochlea; addi
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poſſunt rotæ denticulatæ. </
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APPENDIX TERTIA.
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DE PRINCIPIO PHYSICO
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mechanico impreſsionis.
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<
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">NON ago hîc de impreſſione, quæ fit operâ pulueris tormen
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tarij, vel nerui tenſi, vel aëris compreſſi; nec enim eſt huius
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loci, ſed de illâ, quæ fit operâ alterius potentiæ motricis. </
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">Iniactu duo tantùm conſiderari debent: </
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">Primum eſt po
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tentia, ſecundum linea directionis, quod ſpectat ad primum,
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commune eſt iactui & percuſſioni; de ſecundo iam ſuprà dictum eſt lib.4.
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vbi diximus maximum iactum fieri ad angulum ſemirectum. </
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Principium vniuerſaliſſimum.
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Quò diutius potentia manet applicata maior eſt impreſſio
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; veritas huius
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axiomatis certiſſima eſt, & conſtat ex Ax.13. l.1.n.4. ad hoc autem reuo
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cari poſſunt omnia organa, quæ potentia motrix adhibet ad motum im
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primendum. </
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Corollaria.
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<
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">1. Hinc diu rotatum brachium maiorem ictum infligit; </
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pendulum fune plumbum fortiſſimè ferit; </
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<
s
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">hinc fundæ iactus potentior;
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hinc longior funda longiorem iactum præſtat, &c. </
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<
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">2. Hinc pertica longior, quæ diu vibratur propter maiorem arcum
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validum ictum incutit; adde fuſtem, flagellum,
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lõgum
">longum</
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mallei manubrium. </
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<
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">3. Hinc corpus diu cadens deorſum grauius ferit; hinc aries ille,
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cuius caſus pali figuntur. </
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<
s
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">4. Hinc maius ſaxum, vel grauior ſudes maiorem ictum infligit. </
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<
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">5. Hinc trochus ductario funiculo vibratus celerrimè agitur; </
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">hinc
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etiam plani orbes explicata, & exporrecta zona procul abiguntur; quia
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ſcilicet potentia diu manet applicata. </
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<
s
id
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">6. Hinc antiquus aries diu vibratus, ita verberabat muros, vt ſtatim
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diſijceret propter eandem rationem. </
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<
s
id
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">7. Hinc demum antiquæ illæ machinæ, quarum opera ingentia ſaxa
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iaciebantur; hæc & innumera propemodum alia ex eodem principio
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conſequuntur. </
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