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# Title: Phoronomia, Sive De Viribus Et Motibus Corporum Solidorum Et Fluidorum Libri Duo (shelfmark Leibn. Marg. 182)
# Folio 145, page id 1066518432:0173
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1
DE VIRTBDS ETMOTIBOS CORPORVH. LIB. II. 145
S C H O L XO N.
227. Otulus praecedentium regularum innotescat, unum atque
alterum exemplum afferre libet. Fxempl. I. Ad C alcem Operis
nonnullorum Academix RCg. Paril. Scientiarum Lociorum, quod
inscribitur Divers Ouvraces de Mathematique éx de Physique de
Messieurs de l’Academie Royale des sciences, extat dissertatiuncula
Celeb. Olai Romeri Pani De Crastitie e Viribus tuborum in aquae-
ductibus, sccundum dirersas Fontium alcitudines, direrlasque tu-
borum diametros, in qua dissertatione Fol. 5T7. relatum lesitur, tu-
bum plumbeum diametri 16 pollicum, cum crassitie 65 lincarum.
(linea ipsi cA 122. Dollicis vel 1442. Pedis Parisien(is Pars) prestio-
ni aqua 50 pedum in altitudine Cufficienter restitisse in experimen-
to quodam Vertaliis olim Cumpto, qua obserratione polita, quaerit
Autor qualis crassities alii tubo plumbeo tribui debeat oriticium ha-
benti 10 digitorum, ut aquae pressionem 40 pedum perterre queat.
Canon articuli Cuperioris 275 quaectioni illico latistaciet, cum hoc
calu crastities sint ut rectangula per axem, nam in tubo oblerra-
tionis multiplicando agua altitudinem 50 Dedum in diametrum tu-
bi 16 pollicum, productum 800 denotat rectangulum per axem in
tubo obserrationis, et ducendo altitudinem agux 40 pedum in dia-
metrum 10 pollicum alterius tubi proveniet 400 pro rectangulo per
axem in hoc tubo, quod cum illius 800 tancum dimidium sIC, hu-
jus cubi crassities juxta canonem tantum dimidia erit crassiciei in
tubo oblerrationis, quae crat 6; lincarum, ergo quaesita alterIUS TU-
bi crassities erit tantum 35 linearum, loco 42 lin. circiter, quam
Dn. Romerus repererat, quia relistentias tuborum catuit esse indu-
Plicata ratione crassitierum caeteris existentibus paribus, quas lupra
in propositione apparet esse in simplice non duplicata illa ratione.
278. Fxempl. II. Mariortus censet, ut habetur in eodem Opere
quod in antecedenti exemplo memorari Fol. 513, tubum cupreum
sex pollicum in diametro agux pressionem 30 pedum perterre pol-
se cum crassitie dimidiae linex. Ponamus has tuborum plumbei et
cuprei resistentias aquae prestionibus praecile aequari, inrenienda-
que sic proportio tenacitatis plumbi ex cupri. In Formula Cuveriore
5. 276.) etisis S e s’utpote aequalibus provenit T: F = (MI. D: C):
M. d: C). ubi majusculae ad tubum plumbeum, minusculx vero ad
cupreum pertinent, hinc subrosatis ordine loco M, D, C, nu-
merio