Valerio, Luca, De centro gravitatis solidorvm libri tres

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              PROPOSITIO XXXVI.
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              <s>Omnis portionis ſphæræ abſciſſæ duobus pla­
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              nis parallelis neutro per centrum acto, nec cen­
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              trum intercipientibus, centrum grauitatis eſt in
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              axe primum bifariam ſecto: deinde ſecundum
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              centrum grauitatis fruſti circa eundem axim,
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              abſciſſi à cono verticem habente centrum ſphæ­
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              ræ; in eo puncto in quo dimidius axis maiorem
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              baſim attingens ſic diuiditur, vt pars duabus præ­
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              dictis ſectionibus finita ſit ad eam, quæ inter ſe­
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              cundam, & vltimam ſectionem interijcitur, vt
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              exceſſus, quo maior extrema ad triplas & ſemidia
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              metri ſphæræ, & eius quæ inter centra ſphæræ,
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              & minorem baſim portionis interijcitur, ſuperat
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              tres deinceps proportionales, quarum maxima
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              eſt, quæ inter centra ſphæræ, & minoris baſis,
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              media autem, quæ inter centra ſphæræ, & maio­
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              ris baſis portionis interijcitur; ad maiorem extre­
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              mam antedictam. </s>
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            <p type="main">
              <s>Sit portio ABCD, ſphæræ, cuius centrum E, ab­
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              ſciſsa duobus planis parallelis, neutro per E tranſeun­
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              te, nec E intercipientibus: axis autem portionis ſit GH,
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              maior baſis circulus, cuius diameter AD, minor cuius
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              diameter BC: producta autem GH vſque in E intel­
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              ligatur coni KEN rectanguli, cuius axis EG, fruſtum </s>
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        </body>
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