Musschenbroek, Petrus van, Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae

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              <pb o="47" file="0061" n="61" rhead="DE MAGNETE."/>
            curate congruerent cum iis, quos ipſa obſervatio dedit, non dubi-
              <lb/>
            tarem affirmare vires Magnetis attrahentes Ferrum eſſe in ratione
              <lb/>
            inverſa diſtantiarum, parva enim diſcrepantia, quæ inter ambos
              <lb/>
            numeros, tum ex calculo, tum ex obſervatione poſitos, datur, non
              <lb/>
            prohiberet, quominus hanc proportionem ſtabiliremus; </s>
            <s xml:id="echoid-s1052" xml:space="preserve">quippe
              <lb/>
            experimenta omnia phyſica ejus ſunt naturæ, ut ferè nunquam ac-
              <lb/>
            curatiſſime cum calculo congruant: </s>
            <s xml:id="echoid-s1053" xml:space="preserve">verum in diſtantiis minoribus
              <lb/>
            multo minus convenit calculus cum obſervationibus, nam priorem
              <lb/>
            proportionem continuando, ad diſtantiam 2. </s>
            <s xml:id="echoid-s1054" xml:space="preserve">linearum deberet eſſe
              <lb/>
            attractio 210. </s>
            <s xml:id="echoid-s1055" xml:space="preserve">granorum, quæ modo fuit 179. </s>
            <s xml:id="echoid-s1056" xml:space="preserve">gran· & </s>
            <s xml:id="echoid-s1057" xml:space="preserve">ad diſtantiam
              <lb/>
            1. </s>
            <s xml:id="echoid-s1058" xml:space="preserve">lineæ foret 420. </s>
            <s xml:id="echoid-s1059" xml:space="preserve">granor. </s>
            <s xml:id="echoid-s1060" xml:space="preserve">quæ obſervata fuit modo 231. </s>
            <s xml:id="echoid-s1061" xml:space="preserve">gran. </s>
            <s xml:id="echoid-s1062" xml:space="preserve">at-
              <lb/>
            que ad {1/2} lineam deſiderata fuiſſet 840. </s>
            <s xml:id="echoid-s1063" xml:space="preserve">gran. </s>
            <s xml:id="echoid-s1064" xml:space="preserve">quæ tantum 343. </s>
            <s xml:id="echoid-s1065" xml:space="preserve">gra-
              <lb/>
            nor. </s>
            <s xml:id="echoid-s1066" xml:space="preserve">fuit. </s>
            <s xml:id="echoid-s1067" xml:space="preserve">Unde autem hæc diſcrepantia oritur? </s>
            <s xml:id="echoid-s1068" xml:space="preserve">an quia, quod-
              <lb/>
            cunque fuerit ferrum, vim aliquam repellendi Magnetem habet,
              <lb/>
            quæ ad parvam diffuſa modo diſtantiam, attractionis aliquam par-
              <lb/>
            tem tollit, in quam nihil agit in majori intervallo? </s>
            <s xml:id="echoid-s1069" xml:space="preserve">an vero ipſa vis
              <lb/>
            repellens Magnetis hanc inæqualitatem attractioni affert?</s>
            <s xml:id="echoid-s1070" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1071" xml:space="preserve">Alia Experimenta, nempe XVI. </s>
            <s xml:id="echoid-s1072" xml:space="preserve">& </s>
            <s xml:id="echoid-s1073" xml:space="preserve">XVIII. </s>
            <s xml:id="echoid-s1074" xml:space="preserve">quoque ad examen
              <lb/>
            vocavi, explorans an in diſtantiis a 12 ad 3 lineas etiam daretur
              <lb/>
            attractio in ratione inverſa diſtantiarum, ſed in illis nequaquam
              <lb/>
            numeros tam prope accedentes obſervatis ſuppeditavit calcu-
              <lb/>
            lus, ecce eos juxta ſe poſitos, quos ex Experimento XVI. </s>
            <s xml:id="echoid-s1075" xml:space="preserve">erui-
              <lb/>
            mus:</s>
            <s xml:id="echoid-s1076" xml:space="preserve"/>
          </p>
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          Diſtantiæ \\ Linear. # Numeri \\ calculo inventi. # Attractio \\ obſervata
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          11 # 14 # 14
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          10 # 15 {2/5} # 16
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          9 # 17 {1/9} # 17
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          8 # 19 {2/8} # 21
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          7 # 22 # 29
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          6 # 25 {2/3} # 32
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          5 # 30 {4/5} # 44
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          4 # 38 {1/2} # 52
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          3 # 51 {1/3} # 72
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          2 # 77 # 96
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          1 # 154 # 110
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