PROPOS. V. PROB. III.
Any River of any bigneſs, if being given to examine the
quantity of the Water that runneth thorow the River
in a time aſſigned.
quantity of the Water that runneth thorow the River
in a time aſſigned.
By what we have ſaid already in the two preceding Pro
blems, we may alſo reſolve this that we have now before
us; and it is done, by diverting in the firſt place from the
great River a good big meaſurable Chanel, as is taught in the
ſecond Probleme, and obſerving the abatement of the River,
cauſed by the diverſion of the Chanel; and finding the proporti
on that the Water of the Chanel hath to that of the River, then
let the Water of the Chanel be meaſured by the ſecond Pro
bleme, and work as above, and you ſhall have your deſire.
blems, we may alſo reſolve this that we have now before
us; and it is done, by diverting in the firſt place from the
great River a good big meaſurable Chanel, as is taught in the
ſecond Probleme, and obſerving the abatement of the River,
cauſed by the diverſion of the Chanel; and finding the proporti
on that the Water of the Chanel hath to that of the River, then
let the Water of the Chanel be meaſured by the ſecond Pro
bleme, and work as above, and you ſhall have your deſire.
CONSIDERATION. I.
And although it ſeemeth as if it might prove difficult, and
almoſt impoſſible to make uſe of the Regulator number, if
one be about to meaſure the water of ſome great River,
and conſequently would be impoſſible, or at leaſt very difficult
to reduce the Theory of the firſt Probleme into practice: Yet ne
vertheleſs, I could ſay that ſuch great conceits of meaſuring the
water of a great River, are not to come into the minds of any
but great Perſonages, and potent Princes; of whom it is expected
for their extraordinary concerns, that they will make theſe kinde
of enquiries; as if here in Italy it ſhould be of the Rivers Tyber,
Velino, Chiana, Arno, Serchio, Adice, in which it ſeemeth real
ly difficult to apply the Regulator, to finde exactly the quick
height of the River: But becauſe in ſuch like caſes ſometimes
it would turn to account to be at ſome charge, to come to the
exact and true knowledge of the quantity of water which that
River carrieth, by knowledge whereof, other greater diſ
burſments might afterwards be avoided, that would oft times be
made in vain; and prevent the diſguſts, which ſometimes happen
amongſt Princes: Upon this ground I think it will be well to
ſhew alſo the way how to make uſe of the Regulator in theſe
great Rivers; in which if we will but open our eyes, we ſhall meet
with good ones, and thoſe made without great coſt or labour,
which will ſerve our turn.
almoſt impoſſible to make uſe of the Regulator number, if
one be about to meaſure the water of ſome great River,
and conſequently would be impoſſible, or at leaſt very difficult
to reduce the Theory of the firſt Probleme into practice: Yet ne
vertheleſs, I could ſay that ſuch great conceits of meaſuring the
water of a great River, are not to come into the minds of any
but great Perſonages, and potent Princes; of whom it is expected
for their extraordinary concerns, that they will make theſe kinde
of enquiries; as if here in Italy it ſhould be of the Rivers Tyber,
Velino, Chiana, Arno, Serchio, Adice, in which it ſeemeth real
ly difficult to apply the Regulator, to finde exactly the quick
height of the River: But becauſe in ſuch like caſes ſometimes
it would turn to account to be at ſome charge, to come to the
exact and true knowledge of the quantity of water which that
River carrieth, by knowledge whereof, other greater diſ
burſments might afterwards be avoided, that would oft times be
made in vain; and prevent the diſguſts, which ſometimes happen
amongſt Princes: Upon this ground I think it will be well to
ſhew alſo the way how to make uſe of the Regulator in theſe
great Rivers; in which if we will but open our eyes, we ſhall meet
with good ones, and thoſe made without great coſt or labour,
which will ſerve our turn.
For upon ſuch like Rivers there are Wears, or Lockes made,