Castelli, Benedetto, Of the mensuration of running waters, 1661

List of thumbnails

< >
101
101 		102
102
103
103 		104
104
105
105 		106
106
107
107 		108
108
109
109 		110
110
< >
page |< < of 137 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="068/01/101.jpg" pagenum="87"/>
              the River
                <emph type="italics"/>
              Arno
                <emph.end type="italics"/>
              raiſed by a Land-flood half a Brace, I might con­
                <lb/>
              fidently affirm the ſaid River to be raiſed in
                <emph type="italics"/>
              Piſa
                <emph.end type="italics"/>
              thoſe ſix or ſe­
                <lb/>
              ven Braces, &c. </s>
              <s>From ſuch like accidents I conclude in the ſame
                <lb/>
              Letter, that it is neceſſary to make great account of every little
                <lb/>
              riſe that
                <emph type="italics"/>
              Fiume morto
                <emph.end type="italics"/>
              ſhall make towards the Sea. </s>
              <s>Now cometh
                <lb/>
                <emph type="italics"/>
              Bartolotti
                <emph.end type="italics"/>
              (and perhaps becauſe I knew not how to expreſs my
                <lb/>
              ſelf better, underſtandeth not my Propoſition) and ſpeaketh that
                <lb/>
              which indeed is true, but yet beſides our caſe: Nor have I ever
                <lb/>
              ſaid the contrary; and withall doth not apply it to his purpoſe.
                <lb/>
              </s>
              <s>Nay I ſay, that if he had well applyed it, this alone had been a­
                <lb/>
              ble to have made him change his opinion. </s>
              <s>And becauſe he ſaith,
                <lb/>
              that I ſaid, that it is true, when the abatement proceedeth from
                <lb/>
              ſome cauſe above, as namely by Rain, or opening of Lakes;
                <lb/>
              But when the cauſe is from below, that is, by ſome ſtop, as for
                <lb/>
              inſtance ſome Fiſhers Wears or Locks, or ſome impediment re­
                <lb/>
              mote from the Sea, although at the Level it ſhall riſe ſome Braces
                <lb/>
              where the impediment is, yet that riſing ſhall go upwards; and
                <lb/>
              here he finiſheth his Diſcourſe, and concludeth not any thing
                <lb/>
              more. </s>
              <s>To which I ſay firſt, that I have alſo ſaid the ſame in the
                <lb/>
              Propoſition, namely, that a Flood coming (which maketh
                <emph type="italics"/>
              Arno
                <emph.end type="italics"/>
                <lb/>
              to riſe in
                <emph type="italics"/>
              Piſa
                <emph.end type="italics"/>
              ſix or ſeven Braces (which I take to be a ſuperiour
                <lb/>
              cauſe whether it be Rain or the opening of Lakes, as beſt plea­
                <lb/>
              ſeth
                <emph type="italics"/>
              Bartolotti
                <emph.end type="italics"/>
              ) in ſuch a caſe I ſay, and in no other (for towards
                <lb/>
              the Sea-coaſts it ſhall not cauſe a riſing of full half a Brace; and
                <lb/>
              therefore ſeeing
                <emph type="italics"/>
              Arno
                <emph.end type="italics"/>
              at the Sea-ſide to be raiſed by a Flood, whe­
                <lb/>
              ther of Rain, or of opening of Lakes half a Brace) it may be
                <lb/>
              inferred, that at
                <emph type="italics"/>
              Piſa
                <emph.end type="italics"/>
              it ſhall be raiſed thoſe ſix or ſeven Braces;
                <lb/>
              which variety, well conſidered, explaineth all this affair in favour
                <lb/>
              of my opinion: For the riſing that is made by the impediment
                <lb/>
              placed below, of Fiſhing Weares and Locks, operateth at the be­
                <lb/>
              ginning, raiſing the Waters that are neer to the impediment;
                <lb/>
              and afterwards leſs and leſs, as we retire upwards from the im­
                <lb/>
              pediment: provided yet that we ſpeak not of a Flood that com­
                <lb/>
              meth by acceſſion, but onely of the ordinary Water impeded.
                <lb/>
              </s>
              <s>But there being a new acceſſion, as in our caſe, then the Water
                <lb/>
              of the Flood, I ſay, ſhall make a greater riſing in the parts ſuperi­
                <lb/>
              our, far from the impediment; and theſe impediments ſhall
                <lb/>
              come to be thoſe that ſhall overflow the Plains, as happened
                <lb/>
              eighteen or nineteen years ago, before the opening of
                <emph type="italics"/>
              Fiume
                <lb/>
              morto
                <emph.end type="italics"/>
              into the Sea, The ſame will certainly follow, if
                <emph type="italics"/>
              Fiume
                <lb/>
              morto
                <emph.end type="italics"/>
              be let into
                <emph type="italics"/>
              Serchio.
                <emph.end type="italics"/>
              Here I could alledge a very pretty
                <lb/>
              caſe that befell me in
                <emph type="italics"/>
              la ^{*} Campagna di Roma,
                <emph.end type="italics"/>
              neer to the Sea­
                <lb/>
                <arrow.to.target n="marg975"/>
                <lb/>
              ſide. </s>
              <s>where I drained a Bog or Fen, of the nature of the Wa­
                <lb/>
              ters of
                <emph type="italics"/>
              Piſa,
                <emph.end type="italics"/>
              and I ſucceeded in the enterprize, the Waters in their
                <lb/>
              ſite towards the Sea abating only three Palmes, and yet in the </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum