Galilei, Galileo, The systems of the world, 1661

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              ſtituted in other points of the Quadrant A I, drawing the
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              gents in the ſaid points, and the perpndiculars upon the ſame
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              ling from the terms of the diameters of the Equinoctial drawn
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              from the errect planes by the ſaid Tangents to the plane of the
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              grand Orb; the parts of the ſaid Tangents (which ſhall
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              nually be leſſer towards the Equinoctials, and greater towards the
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              Solſtices) ſhall give us the quantities of the additions and
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              ctions. </s>
              <s>How much in the next place the leaſt additions differ from
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              the greateſt, is eaſie to be known, becauſe there is the ſame
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              ference betwixt them, as between the whole Axis or Diameter of
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              the Sphere, and the part thereof that lyeth between the
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              Circles; the which is leſs than the whole diameter by very near a
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              twelfth part, ſuppoſing yet that we ſpeak of the additions and
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              ſubſtractions made in the Equinoctial; but in the other
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              lels they are leſſer, according as their diameters do diminiſh.</s>
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              <s>This is all that I have to ſay upon this Argument, and all perhaps
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              that can fall under the comprehenſion of our knowledge, which,
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              as you well know, may not entertain any concluſions, ſave onely
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              thoſe that are firm and conſtant, ſuch as are the three kinds of
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              riods of the ebbings and flowings; for that they depend on cauſes
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              that are invariable, ſimple, and eternal. </s>
              <s>But becauſe that
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              condary and particular cauſes, able to make many alterations,
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              termix with theſe that are the primary and univerſal; and theſe
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              ſecondary cauſes being part of them inconſtant, and not to be
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              obſerved; as for example, The alteration of Winds, and part
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              (though terminate and fixed) unobſerved for their multiplicity,
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              as are the lengths of the Straights, their various inclinations
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              wards this or that part, the ſo many and ſo different depths of the
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              Waters, who ſhall be able, unleſs after very long obſervations, and
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              very certain relations, to frame ſo expeditious Hiſtories thereof, as
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              that they may ſerve for Hypoth eſes, and certain ſuppoſitions to
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              ſuch as will by their combinations give adequate reaſons of all the
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              appearances, and as I may ſay, Anomalie, and particular
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              rities that may be diſcovered in the motions of the Waters? </s>
              <s>I
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              will content my ſelf with advertiſing you, that the accidental
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              cauſes are in nature, and are able to produce many alterations;
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              for the more minute obſervations, I remit them to be made by
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              thoſe that frequent ſeveral Seas: and onely by way of a
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              ſion to this our conference, I will propoſe to be conſidered, how
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              that the preciſe times of the fluxes and refluxes do not onely
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              pen to be altered by the length of Straights, and by the
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              rence of depths; but I believe that a notable alteration may alſo
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              proceed from the comparing together of ſundry tarcts of Sea,
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              different in greatneſs; and in poſition, or, if you will,
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              tion; which difference happeneth exactly here in the
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              Adriatick
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