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# Title: [Philosophiae Naturalis Principia Mathematica] Philosophiæ Naturalis Principia Mathematica (shelfmark Leibn. Marg. 166)
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11I
3. 14
PTTTLOSODTILLE NATORALIS
De Moro cus ille celerius propasabitur per Polum aerem verum, idque in
subduplicaca ratione minoris materix. VF A Armosphaera con-
Aet ex decem partibus aeris veri ex una parte raporum, motus
Tonorum celerior erit in subduplicata ratione r1 ad 10, vel in in-
tegra circiter ratione 2I ad 20, quam si propasaretur per undecim
parces aeris reri: ideoque motus Conorum supra inveneus, augen-
dus erit in hac ratione. Quo pacto lonus, tempore minuti unius
Secundi, contcict pedes 114.2.
IIaec ita se habere debene tempore verno ec aucumnali, ubi aci
per calorem temperatum rarescie ec ejus vis clastica nonnihil in-
cendicur. Ac hyberno tempore, ubi aer per trisus condenlatur.
et ejus vis elastica remittitur, mocus Ponorum cardior esse debet in
subduplicata ratione densitatis; ec ricissim aestiro tempore debet
esse velocior.
Constat autem per experimenta quod loni tempore minuti uni-
us secundi cundo, conticiune pedes Londinenses plus minus TT4.2,
Parisienses vero 1070.
Cognita Ponorum relocitate innorescunt eriam intervalla pul-
Tuum. Invenit utique D. Sauveur (Factis a se experimentis) quod
fistula aperta, cujus lonsitudo cA pedum Parisiensium plus minus
quinque. sonum cdit ejuldem toni cum lono chordxe quxe tempore
minuci unius sccundi centies recurrit. Sunt isitur pulsus plus mi-
nus centum in spatio pedum Parisiensium 1070, quos lonus tem-
pore minuti unius sccundi percurrit; adeoque pulsus unus occu-
pac spacium pedum Parisiensium quali 10F0, id est, duplam circi-
ter lonsieudinem Actulae. Onde versimile est quod lacitudines
pulsuum, in omnium apercarum Actularum lonis, aequentur duplis
lonsitudinibus Aictularum.
Porro cur Coni cellante motu corporis lonori catim cessane, ne-
que diucius audiuntur ubi longistime distamus a corporibus sono-
ris, quam cura proxime ablumus, patet ex Corollario Propolicio-
nis XLVEI Libri hujus. Scd ex cur loni in Tubis Aenterophoni
cio valde augentur, ex allacis principiis manifectum est. NOtuS
enim omnis reciprocus lingulis recursibus a causa generante augeri
Solet. Mocus aurem in Tubis dilacacionem lonorum impedienci-
bus, cardius amierieur e Forcius recurrit, et Propterca a motu
novo lingulis recursibus ipretto, masis AUSCTUT. Lx haeC TUNE
praecipua Phaenomena Sonorum.
HC
LORPORDII