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

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              the whole extent of the Lake, it was neceſſary the Water ſhould
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              be raiſed in the ſpace of an hour the ſame meaſure. </s>
              <s>Yet here I
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              conſidered two difficulties that might diſtutb and altar ſuch an
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              effect, or at leaſt render it inobſerveable, which afterwards well
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              weighed, and reſolved, left me (as I will tell you anon) in the
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              concluſion the more confirmed; that the Lake ought to be in­
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              creaſed in the ſpace of eight hours, that the rain laſted eight
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              times that meaſure. </s>
              <s>And whilſt I again expoſed the Glaſs to re­
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              peat the experiment, there came unto me an Ingeneer to talk
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              with me touching certain affairs of our Monaſtary of
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              Perugia,
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              and
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              diſcourſing with him, I ſhewed him the Glaſs out at my Cham­
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              ber-window, expoſed in a Court-yard; and communicated to
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              him my fancy, relacing unto him all that I had done. </s>
              <s>But I
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              ſoon perceived that this brave fellow conceited me to be but of
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              a dull brain, for he ſmilling ſaid unto me; Sir, you deceive
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              your ſelf: I am of opinion that the Lake will not be increaſ­
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              ed by this rain, ſo much as the thickneſſe of a ^{*}
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              Julio.
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              Hearing him pronounce this his opinion with freeneſs and
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              confidence, I urged him to give me ſome reaſon for what he
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              ſaid, aſſuring him, that I would change my judgement, when I
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              ſaw the ſtrength of his Arguments: To which he anſwered, that
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              he had been very converſant about the Lake, and was every day
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              upon it, and was well aſſured that it was not at all increaſed. </s>
              <s>And
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              importuning him further, that he would give me ſome reaſon
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              for his ſo thinking, he propoſed to my conſideration the great
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              drought paſſed, and that that ſame rain was nothing for the
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              great parching: To which I anſwered, I believe Sir that the ſur­
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              face of the Lake, on which the rain had fallen was moiſtned; and
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              therefore ſaw not how its drought, which was nothing at all,
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              could have drunk up any part of the rain. </s>
              <s>For all this he per­
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              ſiſting in his conceit, without yielding in the leaſt to my allega­
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              tion; he granted in the end (I believe in civility to me) that
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              my reaſon was plauſible and good, but that in practiſe it could
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              not hold. </s>
              <s>At laſt to clear up all, I made one be called, and
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              ſent him to the mouth of the Emiſſary of the Lake, with order
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              to bring me an exact account, how he found the water of the
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              Lake, in reſpect of the Tranſome of the Sluice. </s>
              <s>Now here,
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              Signore
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              Galilo,
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              I would not have you think that I had brought
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              the matter in hand to concern me in my honour; but believe me
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              (and there are witneſſes of the ſame ſtill living) that my meſſen­
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              ger returning in the evening to
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              Perugia,
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              he brought me word,
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              that the water of the Lake began to run through the Cave; and
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              that it was riſen almoſt a fingers breadth above the Tranſome:
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              Inſomuch, that adding this meaſure, to that of the lowneſs of
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              the ſurface of the Lake, beneath the Tranſome before the rain, </s>
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