Galilei, Galileo, The systems of the world, 1661

Table of figures

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              <s>
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              conſiſteth the original cauſe of the irregular motion of the
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              ſels, and conſequently of the Ebbing and Flowing: inſomuch
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              that if theſe additions and ſubſtractions ſhould alwayes proceed
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              in the ſame proportion, in reſpect of the Annual motion, the
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              cauſe of the Ebbing and Flowing would indeed continue, but
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              yet ſo as that they would perpetually return in the ſelf ſame
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              ner: But we are to finde out the cauſe of making the ſame
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              bings and Flowings in divers times greater and leſſer:
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              fore we muſt (if we will retain the identity of the cauſe) find the
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              alteration in theſe additions and ſubſtractions, that make them
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              more & leſs potent, in producing thoſe effects which depend
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              upon. </s>
              <s>But I ſee not how that potency and impotence can be
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              duced, unleſſe by making the ſame additions and ſubſtractions,
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              one while greater, and another while leſſer; ſo that the
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              tion and the retardment of the compound motion, may be made,
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              ſometimes in greater, and ſometimes in leſſer proportion.</s>
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            <p type="margin">
              <s>
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                <emph type="italics"/>
              The alterations
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              in the effects argue
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              alteration in the
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              cauſe.
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              <s>
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                <emph type="italics"/>
              The cauſes at
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              large aſſigned of
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              the Periods
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              nethly and
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              al of the ebbing
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              and flowing.
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            <p type="margin">
              <s>
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                <emph type="italics"/>
              The monethly
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              and annual
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              tions of the tide can
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              depend upon
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              thing, ſave on the
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              alteration of the
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              additions &
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              ſtractions of the
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              diurnal period from
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              the annual.
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              </s>
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              <s>SAGR. </s>
              <s>I feel my ſelf very gently led, as it were, by the hand,
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              and though I finde no rubs in the way, yet nevertheleſſe, like a
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              blind man, I ſee not whether your Clue leadeth me, nor can I
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              imagine where ſuch a Journey will end.</s>
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              <s>SALV. </s>
              <s>Though there be a great difference between my ſlow
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              pac't Philoſophy, and your more nimble Reaſon, yet
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              leſſe, in this particular which we are now upon, I do not much
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              wonder, if the apprehenſiveneſſe of your wit be a little
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              red by the dark and thick miſt that hides the mark, at which we
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              aime: and that which leſſeneth my admiration is, the
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              brance of the many hours, many dayes, yea more, many nights
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              that I have conſumed in this contemplation, and of the many
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              times that, deſpairing to bring it to a period, I have, for an
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              couragement of my ſelf, indeavoured to believe, by the
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              ple of the unfortunate
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              Orlando,
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              that that might not poſſibly be
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              true, which yet the teſtimony of ſo many credible men ſet
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              fore my eyes: wonder not, therefore, if this once, contrary to
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              your cuſtome, you do not foreſee what I intend: and if you will
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              needs admire, I believe that the event, as far as I can judge
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              expected, will make you ceaſe your wonderment.</s>
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              <s>SAGR. </s>
              <s>I thank God, that he did not permit that deſperation
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              of yours to end in the
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              Exit
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              that is fabled of the miſerable
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              lando,
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              nor in that which haply is no leſſe fabulouſly related of
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              Ariſtotle,,
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              that ſo neither my ſelf nor others ſhould be deprived
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              of the diſcovery of a thing, as abſtruſe as it was deſirable: I
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              beſeech you, therefore, to ſatisfie my eager appetite as ſoon as
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              you can.</s>
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              <s>SALV. </s>
              <s>I am ready to ſerve you: We were upon an inquiry
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              in what manner the additions and ſubſtractions of the </s>
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