Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667
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              anſwer that ſufficeth to ſatisſie at once the courſe of the ſpots,
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              and the diſcourſe of the Mind. </s>
              <s>I will explain unto you ſo much
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              as I remember thereof, that ſo you may judge thereon as ſeems
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              beſt unto you.</s>
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              The Pure
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              patetick
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              phers will laugh at
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              the ſpots and their
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              Phænomena,
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              as
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              illuſions of the
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              Chryſtals in the
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              Teleſcope.
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              <s>Suppoſing that the apparent motions of the Solar ſpots are the
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              ſame with thoſe that have been above declared, and ſuppoſing the
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              Earth to be immoveable in the centre of the Ecliptick, in whoſe
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              circumference let the center of the Sun be placed; it is neceſſary
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              that of all the differences that are ſeen in thoſe motions, the
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              ſes do reſide in the motions that are in the body of the Sun:
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              Which in the firſt place muſt neceſſarily revolve in it ſelf (
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              i. </s>
              <s>e.
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              about its own axis) carrying the ſpots along therewith; which
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              ſpots have been ſuppoſed, yea and proved to adhere to the
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              lar ſuperficies. </s>
              <s>It muſt ſecondly be confeſt, that the Axis of the
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              Solar converſion is not parallel to the Axis of the Ecliptick, that
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              is as much as to ſay, that it is not perpendicularly erected upon
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              the Plane of the Ecliptick, becauſe if it were ſo, the courſes and
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              exitions of thoſe ſpots would ſeem to be made by right lines
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              rallel to the Ecliptick. </s>
              <s>The ſaid Axis therefore is inclining, in
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              regard the ſaid courſes are for the moſt part made by curve lines.
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              <s>It will be neceſſary in the third place to grant that the
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              on of this Axis is not fixed, and continually extended towards
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              one and the ſame point of the Univerſe, but rather that it doth
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              alwayes from moment to moment go changing its direction; for
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              if the pendency ſhould always look towards the ſelf ſame point,
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              the courſes of the ſpots would never change appearance; but
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              appearing at one time either right or curved, bending upwards
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              or downwards, aſcending or deſcending, they would appear
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              the ſame at all times. </s>
              <s>It is therefore neceſſary to ſay, that the
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              ſaid Axis is convertible; and is ſometimes found to be in the
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              Plane of the circle that is extreme, terminate, or of the viſible
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              Hemiſphere, I mean at ſuch time as the courſes of the ſpots
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              ſeem to be made in right lines, and more than ever pendent,
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              which happeneth twice a year; and at other times found to be in
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              the Plane of the Meridian of the Obſervator, in ſuch ſort that
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              one of its Poles falleth in the viſible Hemiſphere of the Sun, and
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              the other in the occult; and both of them remote from the
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              treme points, or we may ſay, from the poles of another Axis of
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              the Sun, which is parallel to the Axis of the Ecliptick; (which
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              ſecond Axis muſt neceſſarily be aſſigned to the Solar Globe)
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              mote, I ſay, as far as the inclination of the Axis of the revolution
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              of the ſpots doth import; and moreover that the Pole falling in
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              the apparent Hemiſphere, is one while in the ſuperiour, another
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              while in the inferiour part thereof; for that it muſt be ſo, the
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              courſes themſelves do manifeſtly evince at ſuch time as they are </s>
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