Bošković, Ruđer Josip, Abhandlung von den verbesserten dioptrischen Fernröhren aus den Sammlungen des Instituts zu Bologna sammt einem Anhange des Uebersetzers

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        <div xml:id="echoid-div56" type="section" level="1" n="23">
          <p>
            <s xml:id="echoid-s1956" xml:space="preserve">
              <pb o="161" file="0165" n="165" rhead="des Ueberſetzers."/>
            zwenten hinaus gehen, ſondern von der innern
              <lb/>
            Seite gegen die erſte Fläche zurücke prallen.
              <lb/>
            </s>
            <s xml:id="echoid-s1957" xml:space="preserve">Drittens wird von dieſem Lichte noch ein Theil
              <lb/>
            gegen die zweyte Fläche geworfen, und durch
              <lb/>
            dieſelbe hinaus gegen das Aug gehen. </s>
            <s xml:id="echoid-s1958" xml:space="preserve">Der-
              <lb/>
            gleichen Zurückſtraalungen können ſehr viele
              <lb/>
            ſeyn, beſonders bey mehr Gläſern, jedoch wer-
              <lb/>
            den ſie immer ſchwächer, und unmerklich: </s>
            <s xml:id="echoid-s1959" xml:space="preserve">die
              <lb/>
            erſten, als die ſtärkeſten, wenn ſie gewiſſe ih-
              <lb/>
            nen eigene Brennpunkte verurſachen, die etwa
              <lb/>
            nicht gar zu weit von dem wahren Brennpunkte
              <lb/>
            entfernet ſi
              <unsure/>
            nd, vertheilen die Straalen über
              <lb/>
            das ganze Bild, und ma@@en jenen neblichten
              <lb/>
            Schein, von welchem wir itzt Meldung thaten. </s>
            <s xml:id="echoid-s1960" xml:space="preserve">
              <lb/>
            Sind dieſe Brennpunkte etwas lebhafter, und
              <lb/>
            nahe bey dem wahren, erſcheinet der Gegen-
              <lb/>
            ſtand gedoppelt. </s>
            <s xml:id="echoid-s1961" xml:space="preserve">Allein ich hoffe, mein Leſer
              <lb/>
            werde ein größers Vergnügen haben, wenn ich
              <lb/>
            ihm jene Nachricht vollkommen mittheile, die
              <lb/>
            ich von P. </s>
            <s xml:id="echoid-s1962" xml:space="preserve">Boscovich von dieſer ganzen Sache
              <lb/>
            ſelbſt erhalten habe.</s>
            <s xml:id="echoid-s1963" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1964" xml:space="preserve">Ich habe, ſchreibt er, mein zuſammen
              <lb/>
            geſetztes Objectiv (welches au
              <unsure/>
            s Flintglaſs und
              <lb/>
            gemeinem Glaſe zu Meyland verfertiget ward)
              <lb/>
            mit zwey Augengläſern in eine Röhre ge-
              <lb/>
            bracht, und vermerkte eine ſtarke Vergrö-
              <lb/>
            ßerung. </s>
            <s xml:id="echoid-s1965" xml:space="preserve">Der Mond erſchien mir durch ſelbes
              <lb/>
            zwar deutlich, doch ein etwas ſchwächeres
              <lb/>
            Licht, das ſich auf ſein Teller, und um daſ-
              <lb/>
            ſelbe ergoß, benahm der Klarheit ein mer@-
              <lb/>
            liches: </s>
            <s xml:id="echoid-s1966" xml:space="preserve">als ich die allzu große Oeffnung in eine
              <lb/>
            klemere veränderte, nahm daſſelbe ſehr ab,
              <lb/>
            und verſchwand gänzlich, da ich einige Ge-
              <lb/>
            genſtände auf der Grde betrachtete.</s>
            <s xml:id="echoid-s1967" xml:space="preserve"/>
          </p>
        </div>
      </text>
    </echo>
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