Galilei, Galileo, The systems of the world, 1661

Table of figures

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              <s>
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              there are ſuch contrarieties of motions in the parts of the
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              ſtrial Surface, whilſt it turneth round upon its own centre, it is
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              neceſſary, that in conjoyning this Diurnal Motion, with the other
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              Annual, there do reſult an abſolute motion for the parts of the
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              ſaid Terreſtrial Superficies, one while very accelerate, and
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              ther while as ſlow again. </s>
              <s>The which is manifeſt, conſidering
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              firſt the parts about D, the abſolute motion of which ſhall be
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              extream ſwift, as that which proceedeth from two motions made
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              both one way, namely, towards the left hand; the firſt of
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              which is part of the Annual Motion, common to all the parts of
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              the Globe, the other is that of the ſaid point D., carried likewiſe
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              to the left, by the Diurnal Revolution; ſo that, in this caſe, the
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              Diurnal motion increaſeth and accelerateth the Annual. </s>
              <s>The
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              contrary to which happeneth in the oppoſite part F, which, whilſt
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              it is by the common annual motion carried, together with the
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              whole Globe, towards the left, it happeneth to be carried by the
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              Diurnal converſion alſo towards the right: ſo that the
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              nal motion by that means detracteth from the Annual,
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              upon the abſolute motion, reſulting from the compoſition of both
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              the other, is much retarded. </s>
              <s>Again, about the points E and G,
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              the abſolute motion becometh in a manner equal to the ſimple
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              Annual one, in regard that little or nothing increaſeth or
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              niſheth it, as not tending either to the left hand, or to the right,
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              but downwards and upwards. </s>
              <s>We will conclude therefore, that
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              like as it is true, that the motion of the whole Globe, and of
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              each of its parts, would be equal and uniforme, in caſe they did
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              move with one ſingle motion, whether it were the meer Annual,
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              or the ſingle Diurnal Revolution, ſo it is requiſite, that mixing
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              thoſe two motions together, there do reſult thence for the parts
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              of the ſaid Globe irregular motions, one while accelerated, and
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              another while retarded, by means of the additions or
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              ons of the Diurnal converſion from the annual circulation. </s>
              <s>So
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              that, if it be true (and moſt true it is, as experience proves) that
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              the acceleration and retardation of the motion of the
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              ſel, makes water contained therein to run to and again the long
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              waves of it, and to riſe and fall in its extreames, who will make
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              ſcruple of granting, that the ſaid effect may, nay ought to
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              ceed in the Sea-waters, contained within their Veſſels, ſubject to
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              ſuch like alterations, and eſpecially in thoſe that diſtend
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              ſelves long-wayes from Weſt to Eaſt, which is the courſe that
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              the motion of thoſe ſame Veſſels ſteereth? </s>
              <s>Now this is the
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              moſt potent and primary cauſe of the ebbing and flowing,
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              out the which no ſuch effect would enſue. </s>
              <s>But becauſe the
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              ticular accidents are many and various, that in ſeveral places and
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              times are obſerved, which muſt of neceſſity have dependance </s>
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