Gravesande, Willem Jacob 's, Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1

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          <p>
            <s xml:id="echoid-s12019" xml:space="preserve">Celeritas ſoni eadem eſt cum celeritate undarum, quæ au-
              <lb/>
              <note position="left" xlink:label="note-0456-01" xlink:href="note-0456-01a" xml:space="preserve">1182.</note>
            rem percutiunt, & </s>
            <s xml:id="echoid-s12020" xml:space="preserve">quæ de harum celeritate dicta ſunt
              <note symbol="*" position="left" xlink:label="note-0456-02" xlink:href="note-0456-02a" xml:space="preserve">1152. 1153.
                <lb/>
              1155. 1156.
                <lb/>
              1157. 1158.
                <lb/>
              1159. 1160.
                <lb/>
              1161. 1163.
                <lb/>
              1164. 1165.
                <lb/>
              1166.</note>
            huc referri debent. </s>
            <s xml:id="echoid-s12021" xml:space="preserve">Circa n. </s>
            <s xml:id="echoid-s12022" xml:space="preserve">1152. </s>
            <s xml:id="echoid-s12023" xml:space="preserve">notandum ſoni celeri-
              <lb/>
            tatem computatione minime poſſe determinari ; </s>
            <s xml:id="echoid-s12024" xml:space="preserve">
              <note symbol="*" position="left" xlink:label="note-0456-03" xlink:href="note-0456-03a" xml:space="preserve">1162.</note>
            enim eſt proportio inter diametros particularum & </s>
            <s xml:id="echoid-s12025" xml:space="preserve">interſtitia
              <lb/>
            inter has; </s>
            <s xml:id="echoid-s12026" xml:space="preserve">ut &</s>
            <s xml:id="echoid-s12027" xml:space="preserve">, quantum ſpatium particulæ hetorogeneæ
              <lb/>
            in aëre occupant, non conſtat. </s>
            <s xml:id="echoid-s12028" xml:space="preserve">Immediatè Experimento
              <lb/>
            detegitur ſoni celeritas.</s>
            <s xml:id="echoid-s12029" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s12030" xml:space="preserve">Nocte accendatur ignis cum ſtrepitu conjunctus, ad
              <lb/>
              <note position="left" xlink:label="note-0456-04" xlink:href="note-0456-04a" xml:space="preserve">1183.</note>
            quamcunque ab hoc igne antea menſuratam diſtantiam de-
              <lb/>
            tur ſpectator, qui breviori pendulo menſuret tempus inter
              <lb/>
            lumen viſum & </s>
            <s xml:id="echoid-s12031" xml:space="preserve">ſonum auditum, quo datur ſoni celeritas;
              <lb/>
            </s>
            <s xml:id="echoid-s12032" xml:space="preserve">luminis enim motus, ſaltem in ſpatio in quo hoc Experi-
              <lb/>
            mentum inſtitui poteſt, eſt momentaneus.</s>
            <s xml:id="echoid-s12033" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s12034" xml:space="preserve">Tali Experimento in Gallia enotuit ſonum percurrere pe-
              <lb/>
              <note position="left" xlink:label="note-0456-05" xlink:href="note-0456-05a" xml:space="preserve">1184.</note>
            des Gallicos mille & </s>
            <s xml:id="echoid-s12035" xml:space="preserve">octoginta, id eſt, Rhenolandicos mille-
              <lb/>
            centum & </s>
            <s xml:id="echoid-s12036" xml:space="preserve">ſeptemdecim, in ſpatio temporis unius minuti
              <lb/>
            ſecundi: </s>
            <s xml:id="echoid-s12037" xml:space="preserve">ſed non conſtans eſt hæc celeritas .</s>
            <s xml:id="echoid-s12038" xml:space="preserve"/>
          </p>
          <note symbol="*" position="left" xml:space="preserve">1161.</note>
          <p>
            <s xml:id="echoid-s12039" xml:space="preserve">Si eodem tempore, in quo hac methodo determinatur
              <lb/>
              <note position="left" xlink:label="note-0456-07" xlink:href="note-0456-07a" xml:space="preserve">1185.</note>
            ſoni velocitas, detegatur ſpatium percurſum ex elaſticitate
              <note symbol="*" position="left" xlink:label="note-0456-08" xlink:href="note-0456-08a" xml:space="preserve">1152. 1162.</note>
            dabitur ſoni acceleratio ex craſſitie particularum & </s>
            <s xml:id="echoid-s12040" xml:space="preserve">mate-
              <lb/>
            ria heterogenea.</s>
            <s xml:id="echoid-s12041" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s12042" xml:space="preserve">Soni celeritas eſt æquabilis ; </s>
            <s xml:id="echoid-s12043" xml:space="preserve">in majori nihilominus
              <note position="left" xlink:label="note-0456-09" xlink:href="note-0456-09a" xml:space="preserve">1186.</note>
            tio aliquando acceler atur aut retardatur , ex diverſo
              <note symbol="*" position="left" xlink:label="note-0456-10" xlink:href="note-0456-10a" xml:space="preserve">1153.</note>
              <note symbol="*" position="left" xlink:label="note-0456-11" xlink:href="note-0456-11a" xml:space="preserve">1156.</note>
            ſticitatis gradu, qui in variis locis, ſæpe datur .</s>
            <s xml:id="echoid-s12044" xml:space="preserve"/>
          </p>
          <note symbol="*" position="left" xml:space="preserve">1075.</note>
          <p>
            <s xml:id="echoid-s12045" xml:space="preserve">Soni celeritas parum variat ex vento cum illius motu con-
              <lb/>
              <note position="left" xlink:label="note-0456-13" xlink:href="note-0456-13a" xml:space="preserve">1187.</note>
            ſpirante, aut in contrarium flante. </s>
            <s xml:id="echoid-s12046" xml:space="preserve">Vento certa aëris quanti-
              <lb/>
            tas de loco in locum transfertur; </s>
            <s xml:id="echoid-s12047" xml:space="preserve">acceleratur ſonus, quam-
              <lb/>
            diu per illam aëris partem movetur, ſi ſoni directio cum
              <lb/>
            venti directione eadem fuerit; </s>
            <s xml:id="echoid-s12048" xml:space="preserve">cum autem ſonus celerrime
              <lb/>
            moveatur, in tempore breviſſimo percurrit aërem a vento
              <lb/>
            agitatum, & </s>
            <s xml:id="echoid-s12049" xml:space="preserve">non diu acceleratio durat; </s>
            <s xml:id="echoid-s12050" xml:space="preserve">quæ de cetero
              <lb/>
            non admodum eſt magna: </s>
            <s xml:id="echoid-s12051" xml:space="preserve">venti enim violentiſſimi, quo
              <lb/>
            arbores eradicantur, & </s>
            <s xml:id="echoid-s12052" xml:space="preserve">ædificia ſubvertuntur, celeritas ſe
              <lb/>
            habet ad ſoni velocitatem, circiter ut unum ad triginta tria.</s>
            <s xml:id="echoid-s12053" xml:space="preserve"/>
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