Newton, Isaac, Philosophia naturalis principia mathematica, 1713

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                  <s>
                    <pb xlink:href="039/01/466.jpg" pagenum="438"/>
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                  20
                    <emph type="sup"/>
                  gr.
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                  11′. </s>
                  <s>46″, ut 1436 ad 39343 & 4590 ad 489813 conjun­
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                  ctim, id eſt, ut 100 ad 292369. Vires autem quibus Nodi Lu­
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                  narum (ut ſupra explicui) atque adeo quibus puncta Æquinoctia­
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                  lia annuli regrediuntur (id eſt vires 3
                    <emph type="italics"/>
                  IT, in Fig. </s>
                  <s>pag.
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                  403 & 404.)
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                  ſunt in ſingulis particulis ut diſtantiæ particularum à plano
                    <emph type="italics"/>
                  QR,
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                    <lb/>
                  & his viribus particulæ illæ planum fugiunt; & propterea (per
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                  Lem. </s>
                  <s>II.) ſi materia annuli per totam globi ſuperficiem, in mo­
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                  rem figuræ
                    <emph type="italics"/>
                  PapAPepE,
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                  ad ſuperiorem illam Terræ partem
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                  conſtituendam ſpargeretur, vis & efficacia tota particularum om­
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                  nium ad Terram circa quamvis Æquatoris diametrum rotandam,
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                  atque adeo ad movenda puncta Æquinoctialia, evaderet minor
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                  quam prius in ratione 2 ad 5. Ideoque annuus Æquinoctiorum
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                  regreſſus jam eſſet ad 20
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                  gr.
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                  11′. </s>
                  <s>46″, ut 10 ad 73092: ac proinde
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                  fieret 9″. </s>
                  <s>56′. </s>
                  <s>50
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                  iv
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                  . </s>
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                <p type="margin">
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                  DE MUNDI
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                  SYSTEMATE</s>
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                <p type="main">
                  <s>Cæterum hic motus, ob inclinationem plani Æquatoris ad pla­
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                  num Eclipticæ, minuendus eſt, idQ.E.I. ratione ſinus 91706 (qui
                    <lb/>
                  ſinus eſt complementi graduum 23 1/2) ad Radium 100000. Qua
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                  ratione motus iſte jam fiet 9″. </s>
                  <s>7′. </s>
                  <s>20
                    <emph type="sup"/>
                  iv
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                  . </s>
                  <s>Hæc eſt annua Præceſſio
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                  Æquinoctiorum a vi Solis oriunda. </s>
                </p>
                <p type="main">
                  <s>Vis autem Lunæ ad Mare movendum erat ad vim Solis, ut
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                  4,4815 ad 1 circiter. </s>
                  <s>Et vis Lunæ ad Æquinoctia movenda, eſt
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                  ad vim Soiis in eadem proportione. </s>
                  <s>Indeque prodit annua Æ­
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                  quinoctiorum Præceſſio a vi Lunæ oriunda 40″. </s>
                  <s>52′. </s>
                  <s>52
                    <emph type="sup"/>
                  iv
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                  ; ac tota
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                  Præceſſio annua a vi utraque oriunda 50″. </s>
                  <s>00′. </s>
                  <s>12
                    <emph type="sup"/>
                  iv
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                  . </s>
                  <s>Et hic mo­
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                  tus cum Phænomenis congruit. </s>
                  <s>Nam Præceſſio Æquinoctiorum
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                  ex Obſervationibus Aſtronomicis eſt minutorum ſecundorum plus
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                  minus quinquaginta. </s>
                </p>
                <p type="main">
                  <s>Si altitudo Terræ ad Æquatorem ſuperet altitudinem ejus ad
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                  Polos, milliaribus pluribus quam 17 1/6, materia ejus rarior erit ad
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                  circumferentiam quam ad centrum: & Præceſſio Æquinoctiorum
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                  ob altitudinem illam augeri, ob raritatem diminui debet. </s>
                </p>
                <p type="main">
                  <s>Deſcripſimus jam Syſtema Solis, Terræ, Lunæ, & Planetarum:
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                  ſupereſt ut de Cometis nonnulla adjiciantur. </s>
                </p>
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