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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obſervabatur 0, 05 pollicis inceperatque filum ad diſtantiam unius li-
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neæ â fractura in conum abire, vix conſpicuum.</
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">EXPERIMENTUM LIV.</
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">Filum Orichalci craſſitiei C diſſolutum fuit a libris 180, multum
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quoque attenuatum & </
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">elongatum, ut diametrum acceperit 0, 05
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pollicis: </
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<
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xml:space
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">aſperæ fracturæ ſuperficies habebat diametrum 0, 04 pollicis
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abieratque ad diſtantiam {3/4} lineæ a fractura in ſpeciem Coni.</
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">Filum Orichalci craſſitiei D diſſolutum fuit a libris 112, interim
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multum elongatum, ita ut modo retinuerit diametrum 0, 04 pollicis,
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ſuperficies fracturæ fuit 0, 03 pollicis, abierat enim ad diſtantiam {1/2}
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lineæ â fractura in conum, ſed parum conſpicuum.</
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<
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">Si ſecundum craſſities ante Experimentum Cohærentiæ ſeſe ha-
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buiſſent, obſervatæ forent æquales 360 pro A. </
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">270 pro B. </
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C. </
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">90 pro D. </
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<
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">quæ aberratio ab obſervationibus veris eſt multo mi-
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nor, quam ſi ad craſſities poſt Experimenta attendamus, nam tum
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forent pro A 360. </
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<
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">pro B 275 {5/8}. </
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">pro C 140 {5/8}. </
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">pro D 90.</
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xml:space
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">Quatuor ſequentia Experimenta facta ſunt cum filis ex Auro Pis-
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tolettarum compoſitis.</
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<
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">Filum Aureum craſſitiei A a’libris 500 ſucceſſive appoſitis ruptum
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fuit: </
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">antequam frangebatur non multum elongatum aut attenua-
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tum fuit, nam poſt fracturam retinuit diametrum 0, 095 pollicis: </
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ctura fuit valde aſpera diametri 0, 09 pollicis, nam ad diſtantiam
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unius lineæ a fractura abierat in conicam formam, vix tamen ab
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oculo diſtinguendam.</
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<
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">Filum Aureum craſſitiei B ab appenſis ſenſim libris 350. </
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batur, elongatum & </
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