Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667

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            <p type="main">
                <pb xlink:href="040/01/1012.jpg" pagenum="318"/>
              ſuppoſing it's Centre at O by which it is ſuſtained to be no more
              but an indiviſible Point, like as I have ſuppoſed here for the Leaver,
              if the Armes be declined one way or the other, that which ſhall be
              the lowermoſt ought evermore to be adjudged the heavier; ſo that
              the Centre of Gravity is not ſixed and immoveable in each ſeveral
              Body, as the Ancients have ſuppoſed, which no perſon, that I
              know of, hath hitherto obſerved.</s>
            <p type="main">
              <s>But theſe laſt Conſiderations are of no moment in Practice, and
              it would be good for thoſe who ſet themſelves to invent new
              Machines, that they knew nothing more of this buſi­
              neſſe than this little which I have now writ thereof,
              for then they would not be in danger of decei­
              ving themſelves in their Computation,
              as they frequently do in ſuppoſing
              other Principles.</s>
            <p type="head">
                <emph type="italics"/>
                <emph.end type="italics"/>
            <figure id="id.040.01.1012.1.jpg" xlink:href="040/01/1012/1.jpg" number="215"/>