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

Table of Notes

< >
[Note]
Page: 213
[Note]
Page: 213
[Note]
Page: 214
[Note]
Page: 214
[Note]
Page: 215
[Note]
Page: 217
[Note]
Page: 218
[Note]
Page: 219
[Note]
Page: 220
[Note]
Page: 221
[Note]
Page: 221
[Note]
Page: 221
[Note]
Page: 222
[Note]
Page: 222
[Note]
Page: 223
[Note]
Page: 223
[Note]
Page: 225
[Note]
Page: 226
[Note]
Page: 227
[Note]
Page: 228
[Note]
Page: 228
[Note]
Page: 229
[Note]
Page: 230
[Note]
Page: 232
[Note]
Page: 234
[Note]
Page: 235
[Note]
Page: 240
[Note]
Page: 241
[Note]
Page: 245
[Note]
Page: 248
< >
page |< < (200) of 438 > >|
    <echo version="1.0RC">
      <text xml:lang="fr" type="free">
        <div xml:id="echoid-div496" type="section" level="1" n="239">
          <p>
            <s xml:id="echoid-s6368" xml:space="preserve">
              <pb o="200" file="215" n="215" rhead="CONSTRUCTION ET USAGES"/>
            re entrer dans la Jauge l'eau de la ſource par le moyen d'un tuïau,
              <lb/>
            comme la figure le marque, & </s>
            <s xml:id="echoid-s6369" xml:space="preserve">lorſqu'elle ſera pleine environ une
              <lb/>
            ligne près du bord, on ouvrira une des ouvertures, par exemple, d'un
              <lb/>
            pouce; </s>
            <s xml:id="echoid-s6370" xml:space="preserve">ſi l'eau reſte toûjours à même hauteur dans la Jauge, c'eſt une
              <lb/>
            marque qu'il y entre autant d'eau qu'il en ſort, & </s>
            <s xml:id="echoid-s6371" xml:space="preserve">que la ſource four-
              <lb/>
            nit un pouce d'eau. </s>
            <s xml:id="echoid-s6372" xml:space="preserve">Mais ſi l'eau augment oit dans le Vaiſſeau, il fau-
              <lb/>
            droit ouv rir une autre ouverture, ſoit d'un pouce, d'un demi ou d'un
              <lb/>
            quart; </s>
            <s xml:id="echoid-s6373" xml:space="preserve">de telle ſorte que l'eau reſte toûjours à même hauteur dans la
              <lb/>
            Jauge, c'eſt, à-dire, à une ligne au-deſſus des trous d'un pouce, alors
              <lb/>
            le nombre des trous ouverts donnera la quantité d'eau que fournit
              <lb/>
            la ſource.</s>
            <s xml:id="echoid-s6374" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6375" xml:space="preserve">Le petit vaſe qui reçoit l'eau qui ſort de la Jauge, eſt fait pour
              <lb/>
              <note position="left" xlink:label="note-215-01" xlink:href="note-215-01a" xml:space="preserve">Fig. N.</note>
            ſçavoir combien la ſource en fournit dans un eſpace de tems déter-
              <lb/>
            miné, car ayant une pendule à ſecondes bien reglée, & </s>
            <s xml:id="echoid-s6376" xml:space="preserve">remarquant
              <lb/>
            le nombre de ſecondes qu'elle marque lorſque vous placerez le vaiſ-
              <lb/>
            ſeau ſous le canal d'un pouce d'eau, & </s>
            <s xml:id="echoid-s6377" xml:space="preserve">voyant combien il s'eſt paſſé
              <lb/>
            de ſecondes ou de minutes dans le tems qu'il a été à s'emplir, & </s>
            <s xml:id="echoid-s6378" xml:space="preserve">en-
              <lb/>
            ſuite meſurant exactement la quantité d'eau qu'il contient, on di-
              <lb/>
            ra: </s>
            <s xml:id="echoid-s6379" xml:space="preserve">Cette ſource fournit tant d'eau par heure.</s>
            <s xml:id="echoid-s6380" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6381" xml:space="preserve">On a fait plu ſieurs experiences bien juſtes à ce ſujet, & </s>
            <s xml:id="echoid-s6382" xml:space="preserve">on a trou-
              <lb/>
            vé qu'une ſource qui donnoit 1 pouce d'eau, en fourniſſoit 14 pintes
              <lb/>
            meſure de Paris, en une minute de tems, de celle qui peſe 2 livres
              <lb/>
            la pinte.</s>
            <s xml:id="echoid-s6383" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6384" xml:space="preserve">Il s'enſuit de là qu'un pouce d'eau donnera dans l'eſpace d'une
              <lb/>
            heure 3 muids meſure de Paris, & </s>
            <s xml:id="echoid-s6385" xml:space="preserve">en 24 heures 72 muids.</s>
            <s xml:id="echoid-s6386" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6387" xml:space="preserve">Si, par exemple, on plaçoit ſous la Jauge un Viſſeau cubique,
              <lb/>
            contenant un pied cube, & </s>
            <s xml:id="echoid-s6388" xml:space="preserve">qu'on y fit couler l'eau par l'ouverture
              <lb/>
            d'un pouce, on verroit que ce Vaiſſeau ſeroit rempli dans l'eſpace
              <lb/>
            de 2 minutes & </s>
            <s xml:id="echoid-s6389" xml:space="preserve">demie, d'où s'enſuit que c'eſt 14 pintes par minute,
              <lb/>
            puiſqu'elle a fourni 35 pintes en 2 minutes & </s>
            <s xml:id="echoid-s6390" xml:space="preserve">demie.</s>
            <s xml:id="echoid-s6391" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6392" xml:space="preserve">On ſçaura par ce moyen les pouces d'eau que donne une Fontaine
              <lb/>
            ou Ruiſſeau coulant; </s>
            <s xml:id="echoid-s6393" xml:space="preserve">car ſi, par exemple, on a reçû 7 pintes d'eau
              <lb/>
            en une ſeconde, on dira que cette eau coulante eſt d'un pouce. </s>
            <s xml:id="echoid-s6394" xml:space="preserve">Si
              <lb/>
            elle en fourniſſoit 21 pintes, on diroit qu'elle eſt de trois pouces, & </s>
            <s xml:id="echoid-s6395" xml:space="preserve">
              <lb/>
            ainſi des autres.</s>
            <s xml:id="echoid-s6396" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6397" xml:space="preserve">Pour meſurer l'eau courante dans un Aqueduc ou Riviere,
              <lb/>
            qu'on ne peut recev oir dans une Jauge, on mettra ſur l'eau une bou-
              <lb/>
            le de cire chargée de matiere un peu plus péſante, en ſorte qu'il ne
              <lb/>
            paſſe que fort peu de cire au-deſſus de la ſurface de l'eau, de peur
              <lb/>
            du vent: </s>
            <s xml:id="echoid-s6398" xml:space="preserve">& </s>
            <s xml:id="echoid-s6399" xml:space="preserve">après avoir meſuré une longueur de 15 ou 20 pieds de
              <lb/>
            </s>
          </p>
        </div>
      </text>
    </echo>
Impressum