1it hath not been likewiſe with a perfect curioſity inquired, what
its courſe is thorow the particular arches of the Zodiack. That
therefore the Earth and Moon in running through the Zodiack,
that is round the Grand Orb, do ſomewhat accellerate at the
Moons change, and retard at its full, ought not to be doubted;
for that the ſaid difference is not manifeſt, which cometh to be
unobſerved upon two accounts; Firſt, Becauſe it hath not been
lookt for. Secondly, Becauſe that its poſſible it may not be very
great. Nor is there any need that it ſhould be great, for the
ducing the effect that we ſee in the alteration of the greatneſs of
ebbings and flowings. For not onely thoſe alterations, but the
Tides themſelves are but ſmall matters in reſpect of the grandure
of the ſubjects on which they work; albeit that to us, and to our
littleneſs they ſeem great. For the addition or ſubduction of
one degree of velocity where there are naturally 700, or 1000,
can be called no great alteration, either in that which conferreth
it, or in that Which receiveth it: the Water of our Mediterrane
carried about by the diurnal revolution, maketh about 700 miles
an hour, (which is the motion common to the Earth and to it, and
therefore not perceptible to us) & that which we ſenſibly diſcern
to be made in the ſtreams or currents, is not at the rate of full one
mile an hour, (I ſpeak of the main Seas, and not of the Straights)
and this is that which altereth the firſt, naturall, and grand
tion; and this motion is very great in reſpect of us, and of Ships:
for a Veſſel that in a ſtanding Water by the help of Oares can
make v. g. three miles an hour, in that ſame current will row
twice as far with the ſtream as againſt it: A notable difference
in the motion of the Boat, though but very ſmall in the motion
of the Sea, which is altered but its ſeven hundredth part. The
like I ſay of its riſing, and falling one, two, or three feet; and
ſcarcely four or five in the utmoſt bounds of a ſtreight, two
ſand, or more miles long, and where there are depths of hundreds
of feet; this alteration is much leſs than if in one of the Boats
that bring us freſh Water, the ſaid Water upon the arreſt of the
Boat ſhould riſe at the Prow the thickneſs of a leaf. I conclude
therefore that very ſmall alterations in reſpect of the immenſe
greatneſs, and extraordinary velocity of the Seas, is ſufficient to
make therein great mutations in relation to our ſmallneſs, and to
our accidents.
its courſe is thorow the particular arches of the Zodiack. That
therefore the Earth and Moon in running through the Zodiack,
that is round the Grand Orb, do ſomewhat accellerate at the
Moons change, and retard at its full, ought not to be doubted;
for that the ſaid difference is not manifeſt, which cometh to be
unobſerved upon two accounts; Firſt, Becauſe it hath not been
lookt for. Secondly, Becauſe that its poſſible it may not be very
great. Nor is there any need that it ſhould be great, for the
ducing the effect that we ſee in the alteration of the greatneſs of
ebbings and flowings. For not onely thoſe alterations, but the
Tides themſelves are but ſmall matters in reſpect of the grandure
of the ſubjects on which they work; albeit that to us, and to our
littleneſs they ſeem great. For the addition or ſubduction of
one degree of velocity where there are naturally 700, or 1000,
can be called no great alteration, either in that which conferreth
it, or in that Which receiveth it: the Water of our Mediterrane
carried about by the diurnal revolution, maketh about 700 miles
an hour, (which is the motion common to the Earth and to it, and
therefore not perceptible to us) & that which we ſenſibly diſcern
to be made in the ſtreams or currents, is not at the rate of full one
mile an hour, (I ſpeak of the main Seas, and not of the Straights)
and this is that which altereth the firſt, naturall, and grand
tion; and this motion is very great in reſpect of us, and of Ships:
for a Veſſel that in a ſtanding Water by the help of Oares can
make v. g. three miles an hour, in that ſame current will row
twice as far with the ſtream as againſt it: A notable difference
in the motion of the Boat, though but very ſmall in the motion
of the Sea, which is altered but its ſeven hundredth part. The
like I ſay of its riſing, and falling one, two, or three feet; and
ſcarcely four or five in the utmoſt bounds of a ſtreight, two
ſand, or more miles long, and where there are depths of hundreds
of feet; this alteration is much leſs than if in one of the Boats
that bring us freſh Water, the ſaid Water upon the arreſt of the
Boat ſhould riſe at the Prow the thickneſs of a leaf. I conclude
therefore that very ſmall alterations in reſpect of the immenſe
greatneſs, and extraordinary velocity of the Seas, is ſufficient to
make therein great mutations in relation to our ſmallneſs, and to
our accidents.
Many things
may remain as yet
unobſerved in
ſtronomy.
may remain as yet
unobſerved in
ſtronomy.
Saturn for its
ſlowneſs, and
cury for its
neſs of appearing
were amongſt thoſe
that were laſt
ſerved.
ſlowneſs, and
cury for its
neſs of appearing
were amongſt thoſe
that were laſt
ſerved.
Particular
ctures of the Orbs
of the Planets not
yet well reſolved.
ctures of the Orbs
of the Planets not
yet well reſolved.
The Sun
eth one half of the
Zodiack nine days
ſooner than the
other.
eth one half of the
Zodiack nine days
ſooner than the
other.
The Moons
tion principally
ſought in the
count of Eclipſes.
tion principally
ſought in the
count of Eclipſes.
Ebbings and
flowings are petty
things in
ſon of the vaſtneſs
of Seas, and of the
velocity of the
tion of the
ſtrial Globe.
flowings are petty
things in
ſon of the vaſtneſs
of Seas, and of the
velocity of the
tion of the
ſtrial Globe.
SAGR. I am fully ſatisfied as to this particular; it remains to
declare unto us how thoſe additions and ſubſtractions derived
from the diurnal Vertigo are made one while greater, and
ther while leſſer; from which alterations you hinted that the
nual period of the augmentations and diminutions of the
bings and flowings did depend.
declare unto us how thoſe additions and ſubſtractions derived
from the diurnal Vertigo are made one while greater, and
ther while leſſer; from which alterations you hinted that the
nual period of the augmentations and diminutions of the
bings and flowings did depend.