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II I

-·;i~j

TRACTATUS XVII.

DE FONTIBV S

Naturalibus, &Fluminibus.

1.

~ '""~~

O N TES quam amomi fimt, tam ard1uem

efl,

&

operuf11m abdittU eorum

,

~,?-1

..

,k~

',

fw11rigines in lucem edere, 11111

i~~efejfam

illam_ perennitatem .explicare. Cona-

~

bLm11r tamen alu¡utd dtCere,

lit

!tcet fcopum attlngere,

&

rem zp[am omlú fi1b-

.

¡icere non ticeat; q11idq11id tamcn 11111 ex a!torum Ingenio, attt ex mente nojlra,

oz,;

atimjw momenlt videbt111r,

demo1?(ir~ttontbuJ cm~,&

fcienrtfd mC!hodo

jl

4

~

b1üre ttmabwuu. De q11inq1te in hoc mzrtat'.tpr,r.a¡me ag4m; primo de fonti11m origine, (imm–

do de ltbeltationib11s

,

tertio de mr(it,

&

copta demrrentu pcr trtbos aqu,r.; q11arto de falicnti·

b

11 ,

qiúnto 4cj11tminum atrJit,

&

ji

q11.e v1deb1mt1tr ad praxm fjeaamta. non omittam. D-e

hac 7/Jataria rgemnt

.

.

.

.

Joann. Baot. Aleottt1, Ferrarienjis Dttcu

,

&

C/ementLS P'l

11.

Hydrometra,

Bened1El,;, cojleil11s , Abb1u BcnediElimts rn op11fwlo de menfitra ar¡uarum mrrenti11m.

Jo.tnn.

B~pt.

Baraterites in ArchiteEl11r11 aquamm.

P. N1<0/aus

Cab~11s

/.

¡ .

Meteorofog.

Joann. B1pt. Balt1.1n11s de molll l1q1iidomm.

SUPPOSIT IO

I.

Globum rerrnqttemn Sphrericum eílc,nemo en,

hoc

revo

qui dub"cr, ctm1 id innumeris proberur

cxperienriis,,

&

ipra gravium naturn fatis indicer,

qttii a1communc aliquod cenuum fernnmr. N on

hl·

aff

ro

argnmcnca, qure ad id probandnm

fa.

ciunr; id enim

t·x

aliis rraélaribus íufficienrer f\a–

bilimm alf.1mo. St1fficiar modo, ex aqux !L11di–

tatc ahqnid in rern no!lram deducere:poliro cnim

omnium gr>viurn centro,

&

aqmc Ruidirare, faci–

li:

ollen~emus

fopedicicm cjtts omnem ,

&

fplu:–

ncam effe,

&

requab1lirer circa cenrrurn rerra: fu–

fam.

Hoc enim habcnt liquida ,

ut

non ramúm

perpenclicularieer dcrcendrnr;

fcd

etiam oblique,

&

per plana inclinara. S1ve Ruidieas, Ge d1v1li–

bil1ras in rnm1111ílimos globos ; globus aueem

i¡,¡–

ter crercras propricraecs hoc haber,

m

in planis,

vcl camillnm inclinacis conlinerc non valeac:

&

quo fuerir globns minar, eo facilil1s

rnovcacur.Eo

qnod ejus íuperficies rnagis

a

reéla íuperficie re–

cedac, 1nin11fque illi actomrnodetur,

&

congmar;

livc

Huidüas

lit

aliquid alind. Sir ergo rerra: he–

m1fpha:num

ABC,

&

aqure fuperficies

li

ficri po–

rcn,lir plano, qualis reprrefematur per lineam DE,

onendo in cali cafu aquam foblinere non poífe,

fcd neceffario deRuxuram, donec

Ce

accommodet

orhicularieer circa centrum. Cum enim linea:

FB,

DF, fine a:quales, FE majar erit quam DF ; quare

planun~ D~

declive cric , hocen fi aqua feramr

fecundum hnea1:1 DE! vcrc dcÍcender ; fcd quo–

t1efcumq11e fl111dum mvcnir p\anrnn incljnatum

t~nes

dcfcendir pcr illud. Secundo parces G ma–

g•~ p~emunrur,quam

panes

H;

liquida

ame~

hoc

ec'.am habenc , ur quoriefcumque patee exirus

cnam ad lacera partes

a

íupcrioribus preffz , :\)ias

ad lacera cxpellanc; igimr parres G

,.3

ÍUperiori·

bus preíla:,parres

H

loco dimovebunt;

&

deRuc-

re verstls

D

cogenr , donec candem aqu:e fuperA

ficies,

lit

cerrre concentrica.

C O R O L L AR

!U

M

l.

Ex quo facilc concipies fph:ericicacem cerra:'

non

efíe

caufam cur.flumina decurrác;oeque eniro

pucandum en' quod procedendo versus aufü111n

magis defcendacur, quam proccdendo

v~rsus

bo–

rearn; fed neceífarium eífe ad f\uminum curliun,

'm

alvcus defleélat a cerra: rocundicare ,

&

magis

accedat ad cemrum cerr:e,alioquin ll:agnarer aqua,

C O R O L

L

AR I U M

I I.

Q.!;iamvis aqua: in fuperlicie cerra: quiefcencis

fuperficies,idem cum cerra

cenero~

habeanc,acque

adeo cerrenam fuperficiem .perficianc .'

&

conr1-

n11enc : qnre rarncn in pure1s profnnd1onbus ,

&;

foffis delicercunt, alrerius globi minoris foperfi-

cieí