Galilei, Galileo, Discourse concerning the natation of bodies, 1663
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              <s>
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              would make proof of that, which about this Effect the diverſity of
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              gure worketh, its neceſſary to make the Experiment with Matter
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              wherein variety of Gravities hath no place. </s>
              <s>For making uſe of
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              ters which may be different in their Specifical Gravities, and meeting
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              with varieties of effects of Aſcending and Deſcending, we ſhall
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              wayes be left unſatisfied whether that diverſity derive it ſelf really
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              from the ſole Figure, or elſe from the divers Gravity alſo. </s>
              <s>We may
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              remedy this by takeing one only Matter, that is tractable and eaſily
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              reduceable into every ſort of Figure. </s>
              <s>Moreover, it wil be an excellent
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              expedient to take a kinde of Matter, exactly alike in Gravity unto the
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              Water: for that Matter, as far as pertaines to the Gravity, is
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              different either to Aſcend or Deſcend; ſo that we may preſently
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              ſerve any the leaſt difference that derives it ſelf from the diverſity of
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              Figure.</s>
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              <s>Now to do this, Wax is moſt apt, which, beſides its incapacity of </s>
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              <s>
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              receiveing any ſenſible alteration from its imbibing of Water, is
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              ile or pliant, and the ſame piece is eaſily reduceable into all Figures:
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              and being
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              in ſpecie
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              a very inconſiderable matter inferiour in Gravity
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              to the Water, by mixing therewith a little of the fileings of Lead it is
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              reduced to a Gravity exactly equall to that of the Water.</s>
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              An
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              ment in Wax,
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              that proveth
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              gute to have no
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              Operation in
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              Natation &
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              merſion.</s>
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              <s>This Matter prepared, and, for example, a Ball being made
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              of as bigge as an Orange or biger, and that made ſo grave as to
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              ſink to the bottom, but ſo lightly, that takeing thence one only Grain
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              of Lead, it returnes to the top, and being added, it ſubmergeth to
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              the bottom, let the ſame Wax afterwards be made into a very broad
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              and thin Flake or Cake; and then, returning to make the ſame
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              periment, you ſhall ſee that it being put to the bottom, it ſhall, with the
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              Grain of Lead reſt below, and that Grain deducted, it ſhall aſcend to
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              the very Surface, and added again it ſhall dive to the bottom. </s>
              <s>And
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              this ſame effect ſhall happen alwaies in all ſort of Figures, as wel
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              gular as irregular: nor ſhall you ever finde any that will ſwim
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              out the removall of the Grain of Lead, or ſinke to the bottom unleſs
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              it be added: and, in ſhort, about the going or not going to the
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              tom, you ſhall diſcover no diverſity, although, indeed, you ſhall about
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              the quick and ſlow deſcent: for the more expatiated and diſtended
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              Figures move more ſlowly aſwel in the diveing to the bottom as in
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              the riſing to the top; and the other more contracted and compact
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              gures, more ſpeedily. </s>
              <s>Now I know not what may be expected from
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              the diverſity of Figures, if the moſt contrary to one another operate
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              not ſo much as doth a very ſmall Grain of Lead, added or removed.</s>
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              <s>Me thinkes I hear ſome of the Adverſaries to raiſe a doubt upon
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              my produced Experiment. </s>
              <s>And firſt, that they offer to my
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              tion, that the Figure, as a Figure ſimply, and disjunct from the Matter
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              workes not any effect, but requires to be conjoyned with the </s>
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