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# Title: Phoronomia, Sive De Viribus Et Motibus Corporum Solidorum Et Fluidorum Libri Duo (shelfmark Leibn. Marg. 182)
# Folio 178, page id 1066518432:0206
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178 DE VIRTBUS EF MIOTIBUS CORPORUM. L IB. II.
ratione diametrorum, adeo ut txe rariationes in infinitum maxis
magisque sensibiles reddi queant. Sed quia praxis talia semper in-
commoda secum erahere solet, quae theoria successum difficilem et.
siciant, nimia est fugienda horizontalis rami angustia, quia aëris
Pressio non latis commode asit in tubo ralde angusto, nec in coMer.
Curius Facilo mOvCEUT. FTorizontali igitur ramo rix minOr quam
unius linexe diameter cribui debec. Proprerea, loco imminutionis ejus
diametri, Patius est rerticalem ramum majoris amplitudinis aNu.
mere, non quidem per totam ejus lonsitudinem, sed tantum in
Fis. 77. Summitate, addendo scilicet tubo BMI, qui ejusdem ac in vulsari.
bus barometris crassiciei esse porest, captulam ritream AMI, in qua
Nercurius perinde ac in Flugenii seminato descendet atque alcen.
det. Verum existente hac capsula ralde laxa, insignis rami hori.
Zontalis longitudo, quae hoc casut requiritur, instrumentum incon.
cinnum usuique parum accommodatum redderet, nisi incommodo
isti promprum esset remedium, contorquendo ramum horizontalem
in spiralem vel quoquo alio modo in minus spatium redisendo Ae.
xuris illis, quas figura 7 8. exhibet, dummodo hx Aexurx omnes in
eodem plano horizontali exictant.
Ad commodiorem hujus Barometri impletionem non abs re Fore
NOLaL AutOT, Si ramus perpendicularis AB in exiguum tubulum in
L apertum desinat, ita uE per ejus orificium arsentum rirum in-
Fundi possit, dum orificium rami horizontalis C, obstructum tene-
tur. Ambobus ramis hoc pacto impletis orificium L hermetice est
Tigillaridum ex obturamentum, quo orificium C obstruebatur, demen-
dum, ut arsentum rirum in verticali cubo AB ad consuetam in
communioribus barometris altitudinem se demittere possit scilicee
ad terminum D, ex ex horizontali ramo Cuper Auus eAluere hydear.
OVruS; Sed quia hac ratione ramus, horizontalis Mercurii plenuSMI-
nebit, suctione pars ejus conreniens est adimenda vel beneticio tu-
bi capillaris ampultula instructi, quae calefacta at que tubo horizon.
tali intrusa atque in eo retrigelcens Mercurium in suam caritatem
crahet. Ilac ratione barometrum constructum uluique paratum
crit.
Caeterum non inutile fuerie, E tubus rerticalis in loco, quo hori-
contali jungitur, exigua curratura instar receptaculi FI insruatuE,
ad impediendum ex horizontali in rerticalem ramum aeris ingrel.
Tum, SI quando HOTIZONEALEM FOFEC MTCTCUTIIS deACCrCE, auE Fortasse
etiam ex nimia atmosphaera prectione seu a vibrationibus Mercurii