Bion, Nicolas, Traité de la construction et principaux usages des instruments de mathématique, 1723

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          <head xml:id="echoid-head560" style="it" xml:space="preserve">Planche Treizieme. Page 156.</head>
          <figure number="250">
            <caption xml:id="echoid-caption226" style="it" xml:space="preserve">Fig. A.</caption>
            <description xml:id="echoid-description64" xml:space="preserve">Vaugirard</description>
            <description xml:id="echoid-description65" xml:space="preserve">Montrouge</description>
            <description xml:id="echoid-description66" xml:space="preserve">Gentilly</description>
            <description xml:id="echoid-description67" xml:space="preserve">Ivry</description>
            <description xml:id="echoid-description68" xml:space="preserve">Salpetrier</description>
            <variables xml:id="echoid-variables143" xml:space="preserve">120 110 100 90 80 70 60 50 40 30 20 10 10 20 30 40 60 70 80 90 100 110 120 130
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            140 150 160 170 180 170 160 150 140
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            B C F D E</variables>
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          <figure number="251">
            <caption xml:id="echoid-caption227" style="it" xml:space="preserve">Fig. 1.</caption>
            <description xml:id="echoid-description69" xml:space="preserve">Obſervatoire</description>
            <description xml:id="echoid-description70" xml:space="preserve">Salpetrier</description>
            <description xml:id="echoid-description71" xml:space="preserve">Vaugirard</description>
            <description xml:id="echoid-description72" xml:space="preserve">Echelle de 1000 Toiſes</description>
            <description xml:id="echoid-description73" xml:space="preserve">Montrouge</description>
            <description xml:id="echoid-description74" xml:space="preserve">Gentilly</description>
            <description xml:id="echoid-description75" xml:space="preserve">Ivry</description>
            <variables xml:id="echoid-variables144" xml:space="preserve">100 200 400 600 800 1000</variables>
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          <figure number="252">
            <caption xml:id="echoid-caption228" style="it" xml:space="preserve">Fig. 2.</caption>
            <description xml:id="echoid-description76" xml:space="preserve">Echelle de 10. Toiſes</description>
            <variables xml:id="echoid-variables145" xml:space="preserve">A 1 2 3 4 5 6 7 8 9 10 B
              <lb/>
            A B C</variables>
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          <figure number="253">
            <caption xml:id="echoid-caption229" style="it" xml:space="preserve">Fig G</caption>
            <description xml:id="echoid-description77" xml:space="preserve">Umbre Verſe</description>
            <description xml:id="echoid-description78" xml:space="preserve">Umbre Droite</description>
            <variables xml:id="echoid-variables146" xml:space="preserve">20 30 40 50 60 70 80 90 100
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            20 30 40 50 60 70 80 90 100
              <lb/>
            10 20 30 40 50 60 70 80 90
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            10 20 30 40 50 60 70 80 90 100
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            15 30 45 60
              <lb/>
            10 20 30 40 50 60 70 80 90
              <lb/>
            10 20 30 40 50 60 70 80 90
              <lb/>
            15 30 45 60</variables>
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          <figure number="254">
            <caption xml:id="echoid-caption230" style="it" xml:space="preserve">Fig. 3.</caption>
            <variables xml:id="echoid-variables147" xml:space="preserve">D G F E</variables>
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          <figure number="255">
            <caption xml:id="echoid-caption231" style="it" xml:space="preserve">Fig. 4.</caption>
            <variables xml:id="echoid-variables148" xml:space="preserve">A D C</variables>
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          <figure number="256">
            <caption xml:id="echoid-caption232" style="it" xml:space="preserve">Fig. 5.</caption>
            <variables xml:id="echoid-variables149" xml:space="preserve">B A C D</variables>
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          <figure number="257">
            <caption xml:id="echoid-caption233" style="it" xml:space="preserve">Fig. H</caption>
            <variables xml:id="echoid-variables150" xml:space="preserve">65 60 55 50 45 40 35 30 25 20 15 10 5 5 10 15
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            A e D E F B
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            5 10 20 30 40 50 60 70 80 90</variables>
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