1ment that they generate and diſſolve; for if without generating
or corrrupting, they ſhould appear there by onely local motion,
they would all be ſeen to enter, and paſs out by the extreme
cumference. The other obſervation to ſuch as are not ſituate in
the loweſt degree of ignorance in Perſpective, by the mutation
of the appearing figures, and by the apparent mutations of the
velocity of motion is neceſſarily concluding, that the ſpots are
contiguous to the body of the Sun, and that touching its
cies, they move either with it or upon it, and that they in no wiſe
move in circles remote from the ſame. The motion proves
it, which towards the circumference of the Solar Circle,
appeareth very ſlow, and towards the midſt, more ſwift; the
gures of the ſpots confirmeth it, which towards the circumference
appear exceeding narrow in compariſon of that which they ſeem
to be in the parts nearer the middle; and this becauſe in the
midſt they are ſeen in their full luſter, and as they truly be; and
towards the circumference by reaſon of the convexity of the
bous ſuperficies, they ſeem more compreſſ'd: And both theſe
diminutions of figure and motion, to ſuch as know how to obſerve
and calculate them exactly, preciſely anſwer to that which ſhould
appear, the ſpots being contiguous to the Sun, and differ
cileably from a motion in circles remote, though but for ſmal
intervalls from the body of the Sun; as hath been diffuſely
monſtrated by our ^{*} Friend, in his Letters about the Solar ſpots,
to Marcus Velſerus. It may be gathered from the ſame
tion of figure, that none of them are ſtars, or other bodies of
ſpherical figure; for that amongſt all figures the ſphere never
appeareth compreſſed, nor can ever be repreſented but onely
fectly round; and thus in caſe any particular ſpot were a round
body, as all the ſtars are held to be, the ſaid roundneſs would as
well appear in the midſt of the Solar ring, as when the ſpot is near
the extreme: whereas, its ſo great compreſſion, and ſhewing its
ſelf ſo ſmall towards the extreme, and contrariwiſe, ſpatious and
large towards the middle, aſſureth us, that theſe ſpots are flat
plates of ſmall thickneſs or depth, in compariſon of their length
and breadth. Laſtly, whereas you ſay that the ſpots after their
determinate periods are obſerved to return to their former aſpect,
believe it not, Simplicius, for he that told you ſo, will deceive
you; and that I ſpeak the truth, you may obſerve them to be hid
in the face of the Sun far from the circumference; nor hath your
Obſervator told you a word of that compreſſion, which
rily argueth them to be contiguous to the Sun. That which he
tells you of the return of the ſaid ſpots, is nothing elſe but what
is read in the forementioned Letters, namely, that ſome of them
may ſometimes ſo happen that are of ſo long a duration, that
or corrrupting, they ſhould appear there by onely local motion,
they would all be ſeen to enter, and paſs out by the extreme
cumference. The other obſervation to ſuch as are not ſituate in
the loweſt degree of ignorance in Perſpective, by the mutation
of the appearing figures, and by the apparent mutations of the
velocity of motion is neceſſarily concluding, that the ſpots are
contiguous to the body of the Sun, and that touching its
cies, they move either with it or upon it, and that they in no wiſe
move in circles remote from the ſame. The motion proves
it, which towards the circumference of the Solar Circle,
appeareth very ſlow, and towards the midſt, more ſwift; the
gures of the ſpots confirmeth it, which towards the circumference
appear exceeding narrow in compariſon of that which they ſeem
to be in the parts nearer the middle; and this becauſe in the
midſt they are ſeen in their full luſter, and as they truly be; and
towards the circumference by reaſon of the convexity of the
bous ſuperficies, they ſeem more compreſſ'd: And both theſe
diminutions of figure and motion, to ſuch as know how to obſerve
and calculate them exactly, preciſely anſwer to that which ſhould
appear, the ſpots being contiguous to the Sun, and differ
cileably from a motion in circles remote, though but for ſmal
intervalls from the body of the Sun; as hath been diffuſely
monſtrated by our ^{*} Friend, in his Letters about the Solar ſpots,
to Marcus Velſerus. It may be gathered from the ſame
tion of figure, that none of them are ſtars, or other bodies of
ſpherical figure; for that amongſt all figures the ſphere never
appeareth compreſſed, nor can ever be repreſented but onely
fectly round; and thus in caſe any particular ſpot were a round
body, as all the ſtars are held to be, the ſaid roundneſs would as
well appear in the midſt of the Solar ring, as when the ſpot is near
the extreme: whereas, its ſo great compreſſion, and ſhewing its
ſelf ſo ſmall towards the extreme, and contrariwiſe, ſpatious and
large towards the middle, aſſureth us, that theſe ſpots are flat
plates of ſmall thickneſs or depth, in compariſon of their length
and breadth. Laſtly, whereas you ſay that the ſpots after their
determinate periods are obſerved to return to their former aſpect,
believe it not, Simplicius, for he that told you ſo, will deceive
you; and that I ſpeak the truth, you may obſerve them to be hid
in the face of the Sun far from the circumference; nor hath your
Obſervator told you a word of that compreſſion, which
rily argueth them to be contiguous to the Sun. That which he
tells you of the return of the ſaid ſpots, is nothing elſe but what
is read in the forementioned Letters, namely, that ſome of them
may ſometimes ſo happen that are of ſo long a duration, that