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

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          <head xml:id="echoid-head569" style="it" xml:space="preserve">Planche Vingt-deuxieme Page 300.</head>
          <figure number="316">
            <caption xml:id="echoid-caption292" style="it" xml:space="preserve">Fig. 1.</caption>
            <variables xml:id="echoid-variables201" xml:space="preserve">A H B L K I G C F D E</variables>
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          <figure number="317">
            <caption xml:id="echoid-caption293" style="it" xml:space="preserve">Fig. 2.</caption>
            <variables xml:id="echoid-variables202" xml:space="preserve">A B F E C D</variables>
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          <figure number="318">
            <caption xml:id="echoid-caption294" style="it" xml:space="preserve">Fig. 3.</caption>
            <description xml:id="echoid-description280" style="it" xml:space="preserve">Angle de 116. d. 34</description>
            <variables xml:id="echoid-variables203" xml:space="preserve">V L P N T K A S O E I F D X Q B R H C G M</variables>
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          <figure number="319">
            <caption xml:id="echoid-caption295" style="it" xml:space="preserve">Fig. 4.</caption>
            <description xml:id="echoid-description281" style="it" xml:space="preserve">Horizontal.</description>
            <variables xml:id="echoid-variables204" xml:space="preserve">VIII IIII VII VI V IIII III II I XII XI X IX VIII VII VI V
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            A C E D I G L H N F K M B
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            4 3 2 1</variables>
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          <figure number="320">
            <caption xml:id="echoid-caption296" style="it" xml:space="preserve">Fig. 5.</caption>
            <description xml:id="echoid-description282" style="it" xml:space="preserve">Vertical.</description>
            <description xml:id="echoid-description283" style="it" xml:space="preserve">Ligne</description>
            <description xml:id="echoid-description284" style="it" xml:space="preserve">Horizontale</description>
            <variables xml:id="echoid-variables205" xml:space="preserve">6 7 8 9 10 11 12 1 2 3 4 5 6
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            C E D G L I H K M B F</variables>
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          <figure number="321">
            <caption xml:id="echoid-caption297" style="it" xml:space="preserve">Fig. 6</caption>
            <description xml:id="echoid-description285" style="it" xml:space="preserve">Polaire Superieur.</description>
            <variables xml:id="echoid-variables206" xml:space="preserve">VII VIII IX XXI XII I II III IIII V
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            H I L K B G C F A D 69 69
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            7 8 9 10 11 12 12 3 4 5</variables>
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          <figure number="322">
            <caption xml:id="echoid-caption298" style="it" xml:space="preserve">Fig. 7.</caption>
            <description xml:id="echoid-description286" style="it" xml:space="preserve">Equinoxial Superieur</description>
            <description xml:id="echoid-description287" style="it" xml:space="preserve">Arc diurne</description>
            <variables xml:id="echoid-variables207" xml:space="preserve">7 14 15 II 16 160 15 14 5
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            49. d.
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            13 6 5 4 3 2 1 12 11 10 9 8 7 6 13
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            F H D A E B C</variables>
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