Newton, Isaac, Philosophia naturalis principia mathematica, 1713

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                  <s>
                    <pb xlink:href="039/01/480.jpg" pagenum="452"/>
                    <arrow.to.target n="note481"/>
                  ut temporum differentia ſit ad ſummam temporum, ut ſumma tem­
                    <lb/>
                  porum ad dies plus minus ſexcentos; vel ut punctum
                    <emph type="italics"/>
                  E
                    <emph.end type="italics"/>
                  incidat in
                    <lb/>
                  punctum
                    <emph type="italics"/>
                  M
                    <emph.end type="italics"/>
                  quamproxime, & inde aberret verſus
                    <emph type="italics"/>
                  I
                    <emph.end type="italics"/>
                  potius quam
                    <lb/>
                  verſus
                    <emph type="italics"/>
                  A.
                    <emph.end type="italics"/>
                  Si tales obſervationes non præſto ſint, inveniendus eſt
                    <lb/>
                  novus Cometæ locus per Lemma ſextum. </s>
                </p>
                <p type="margin">
                  <s>
                    <margin.target id="note481"/>
                  DE MUNDI
                    <lb/>
                  SYSTEMATE</s>
                </p>
                <p type="main">
                  <s>Deſignent
                    <emph type="italics"/>
                  S
                    <emph.end type="italics"/>
                  Solem,
                    <emph type="italics"/>
                  T, t,
                    <emph.end type="italics"/>
                    <foreign lang="grc">τ</foreign>
                  tria loca Terræ in Orbe magno,
                    <lb/>
                    <emph type="italics"/>
                  TA, tB,
                    <foreign lang="grc">τ</foreign>
                  C
                    <emph.end type="italics"/>
                  obſervatas tres longitudines Cometæ, V tempus in­
                    <lb/>
                  ter obſervationem primam & ſecundam, W tempus inter ſecun­
                    <lb/>
                  dam ac tertiam, X longitudinem quam Cometa toto illo tempore,
                    <lb/>
                  ea cum velocitate quam habet in mediocri Telluris à Sole diſtan­
                    <lb/>
                  tia, deſcribere poſſet, quæque per Corol. </s>
                  <s>3. Prop. </s>
                  <s>XL, Lib. </s>
                  <s>III.
                    <lb/>
                  invenienda eſt, &
                    <emph type="italics"/>
                  tV
                    <emph.end type="italics"/>
                  perpendiculum in chordam
                    <emph type="italics"/>
                  T
                    <emph.end type="italics"/>
                    <foreign lang="grc">τ. </foreign>
                  </s>
                  <s>In longi­
                    <lb/>
                    <figure id="id.039.01.480.1.jpg" xlink:href="039/01/480/1.jpg" number="231"/>
                    <lb/>
                  tudine media
                    <emph type="italics"/>
                  tB
                    <emph.end type="italics"/>
                  ſumatur utcunque punctum
                    <emph type="italics"/>
                  B
                    <emph.end type="italics"/>
                  pro loco Co­
                    <lb/>
                  metæ in plano Eclipticæ, & inde verſus Solem
                    <emph type="italics"/>
                  S
                    <emph.end type="italics"/>
                  ducatur linea
                    <lb/>
                    <emph type="italics"/>
                  BE,
                    <emph.end type="italics"/>
                  quæ ſit ad ſagittam
                    <emph type="italics"/>
                  tV,
                    <emph.end type="italics"/>
                  ut contentum ſub
                    <emph type="italics"/>
                  SB
                    <emph.end type="italics"/>
                  &
                    <emph type="italics"/>
                  St quad.
                    <emph.end type="italics"/>
                    <lb/>
                  ad cubum hypotenuſæ trianguli rectanguli, cujus latera ſunt
                    <emph type="italics"/>
                  SB
                    <emph.end type="italics"/>
                  &
                    <lb/>
                  tangens latitudinis Cometæ in obſervatione ſecunda ad radium
                    <emph type="italics"/>
                  tB.
                    <emph.end type="italics"/>
                  </s>
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