Galilei, Galileo, The systems of the world, 1661

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            <p type="main">
              <s>
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              and others more ſlowly than the ſimple; as for example, Lead, and
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              Wood, in compariſon of earth; and therefore amongſt theſe
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              tions, which call you the ſimple, and which the mixt?</s>
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              <s>SIMPL. </s>
              <s>I would call that ſimple motion, which is made by a
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              ſimple body, and mixt, that of a compound body.</s>
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              <s>SAGR. </s>
              <s>Very well, and yet
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              Simplicius
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              a little before you ſaid,
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              that the ſimple, and compound motions, diſcovered which were
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              mixt, and which were ſimple bodies; now you will have me by
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              ſimple and mixt bodies, come to know which is the ſimple, and
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              which is the compound motion: an excellent way to keep us
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              rant, both of motions and bodies. </s>
              <s>Moreover you have alſo a little
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              above declared, how that a greater velocity did not ſuffice, but
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              you ſeek a third condition for the definement of ſimple motion, for
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              which
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              Ariſtotle
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              contented himſelf with one alone, namely, of the
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              ſimplicity of the Space, or
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              Medium
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              : But now according to you,
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              the ſimple motion, ſhall be that which is made upon a ſimple line,
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              with a certain determinate velocity, by a body ſimply moveable.
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              </s>
              <s>Now be it as you pleaſe, and let us return to
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              Ariſtotle,
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              who
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              neth the mixt motion to be that compounded of the right, and
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              cular, but produceth not any body, which naturally moveth with
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              ſuch a motion.</s>
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            <p type="main">
              <s>SALV. </s>
              <s>I come again to
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              Ariſtotle,
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              who having very well, and
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              Methodically begun his diſcourſe, but having a greater aim to
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              reſt at, and hit a marke, predefigned in his minde, then that to
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              which his method lead him, digreſſing from the purpoſe, he comes
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              to aſſert, as a thing known and manifeſt, that as to the motions
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              directly upwards or downwards, they naturally agree to Fire, and
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              Earth; and that therefore it is neceſſary, that beſides theſe bodies,
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              which are neer unto us, there muſt be in nature another, to which
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              the circular motion may agree: which ſhall be ſo much the more
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              excellent by how much the circular motion is more perfect, then the
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              ſtreight, but how much more perfect that is than this, he
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              mines from the greatneſs of the circular lines perfection above the
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                <arrow.to.target n="marg23"/>
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              right line; calling that perfect, and this imperfect; imperfect,
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              cauſe if infinite it wanteth a termination, and end: and if it be
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              nite, there is yet ſomething beyond which it may be prolonged.
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              </s>
              <s>This is the baſis, ground work, and maſter-ſtone of all the Fabrick
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              of the
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              Aristotelian
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              World, upon which they ſuperſtruct all their
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              other properties, of neither heavy nor light, of ingenerable
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              ruptible, exemption from all motions, ſome onely the local, &c.
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              </s>
              <s>And all theſe paſſions he affirmeth to be proper to a ſimple body
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              that is moved circularly; and the contrary qualities of gravity,
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              levity, corruptibility, &c. </s>
              <s>he aſſigns to bodies naturally moveable
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              in a ſtreight line, for that if we have already diſcovered defects in
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              the foundation, we may rationally queſtion what ſoever may </s>
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          </chap>
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      </text>
    </archimedes>
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