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

Table of figures

< >
< >
page |< < (276) of 795 > >|
    <echo version="1.0RC">
      <text xml:lang="la" type="free">
        <div xml:id="echoid-div176" type="section" level="1" n="176">
          <p>
            <s xml:id="echoid-s6567" xml:space="preserve">
              <pb o="276" file="0290" n="290" rhead="PRÆFATIO."/>
            non confido quemquam dari adeo imperitum, qui eos extemplo
              <lb/>
            juxta artificioſiſſimos conflare non poterit: </s>
            <s xml:id="echoid-s6568" xml:space="preserve">primum enim ſollicitus
              <lb/>
            quære tubos vitreos in officina vitraria ductos, accurate cylindri-
              <lb/>
            cos, quorum interna cavitas perfecte cylindrica eſt, nam niſi ejuſ-
              <lb/>
            modi electi fuerint, nunquam tubos capillares perfecte cylindricos,
              <lb/>
            quales tamen pro experimentis accuratis deſiderantur, compones:
              <lb/>
            </s>
            <s xml:id="echoid-s6569" xml:space="preserve">perinde eſt fere cujuſnam fuerint diametri, nam ab una uſque ad ſex
              <lb/>
            plureſve lineas craſſities conducunt: </s>
            <s xml:id="echoid-s6570" xml:space="preserve">Tum cape Lampadem encau-
              <lb/>
            ſti inſtructam 100 pluribusve filis cotoneis, perpendiculariter ere-
              <lb/>
            ctis, atque in duos cumulos denſos congeſtis, in quorum medio
              <lb/>
            hiulcus maneat unius vel ſesqui linearum, quemadmodum conſpici
              <lb/>
            poteſt in Tab. </s>
            <s xml:id="echoid-s6571" xml:space="preserve">2. </s>
            <s xml:id="echoid-s6572" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s6573" xml:space="preserve">8. </s>
            <s xml:id="echoid-s6574" xml:space="preserve">infuſo oleo, excitataque flamma tubum inflato-
              <lb/>
            rium tene eregione medii hiulci, ut ventum per eum pellas, flamma
              <lb/>
            condenſabitur, horizontali directione acta; </s>
            <s xml:id="echoid-s6575" xml:space="preserve">in hujus medio, ubi
              <lb/>
            fervor maximus regnat, tubum tene, ipſum perpetuo circumver-
              <lb/>
            tendo, ut æquabiliter calefiat, donec bene rubeat, ductilisque eva-
              <lb/>
            ſerit, tum ex flamma exemtum extrahe recta, ſponte tubum an-
              <lb/>
            guſtum formabis; </s>
            <s xml:id="echoid-s6576" xml:space="preserve">ſi cum impetu celeriterque extraxeris, acquires
              <lb/>
            anguſtiſſimum; </s>
            <s xml:id="echoid-s6577" xml:space="preserve">ſi tardius, latiorem: </s>
            <s xml:id="echoid-s6578" xml:space="preserve">ad anguſtiſſimos conflandos, ca-
              <lb/>
            piantur tubi minoris diametri, & </s>
            <s xml:id="echoid-s6579" xml:space="preserve">bene in igne candefiant antequam
              <lb/>
            extrahantur, tum & </s>
            <s xml:id="echoid-s6580" xml:space="preserve">anguſtiſſimos & </s>
            <s xml:id="echoid-s6581" xml:space="preserve">plurimos pedes longos habe-
              <lb/>
            bis; </s>
            <s xml:id="echoid-s6582" xml:space="preserve">ſolent omnes hi eſſe conici, in medio anguſtiores, latiores ad
              <lb/>
            utrumque finem, ideo pro experimentis partes mediæ exſcindendæ
              <lb/>
            ex longiſſimis ſunt, quæ ſatis bene cylindricæ erunt.</s>
            <s xml:id="echoid-s6583" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6584" xml:space="preserve">2. </s>
            <s xml:id="echoid-s6585" xml:space="preserve">Quia omne vitrum non æque magnam attrahendi vim habet,
              <lb/>
            etiam phænomenorum datur differentia; </s>
            <s xml:id="echoid-s6586" xml:space="preserve">ne quis igitur experimen-
              <lb/>
            ta noſtra imitatus, aliumque effectum paulo diverſum obſervans,
              <lb/>
            illico erroris nos arguat, ſi enim alterius indolis vitrum elegerit,
              <lb/>
            etiam diverſos a ſuis prioribus animadvertet effectus; </s>
            <s xml:id="echoid-s6587" xml:space="preserve">haud aliter ac
              <lb/>
            Magnetes debilioris aut præſtantioris virtutis cum Ferro plus mi-
              <lb/>
            nuſve virium communicant, Verſoriumque magis minuſve infra
              <lb/>
            horizontem deprimunt, atque variâ tempeſtate diverſas exhibent
              <lb/>
            operationes, uti ſæpe monui in Diſſertatione de Magnete.</s>
            <s xml:id="echoid-s6588" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6589" xml:space="preserve">3. </s>
            <s xml:id="echoid-s6590" xml:space="preserve">Menſura in hoc Capite uſus fui Rhenolandica, in qua pes
              <lb/>
            dividitur in 12 pollices: </s>
            <s xml:id="echoid-s6591" xml:space="preserve">pollex in 12 lineas.</s>
            <s xml:id="echoid-s6592" xml:space="preserve"/>
          </p>
        </div>
      </text>
    </echo>
Impressum