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

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              ning Water is reputed in ſome ſenſe infinite, in that it never cea­
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              ſeth to move away, and as infinite is judged incomprehenſible;
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              and ſuch as that there is no exact knowledge to be had thereof;
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              & ſo there comes to be no account made thereof; but if we ſhould
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              make ſtrict reflection upon our conſideration of the velocity of
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              Water, we ſhould find, that keeping account of the ſame, there
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              is a reckoning alſo made of the length; foraſmuch as whilſt we
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              ſay, the Water of ſuch a Spring runs with the velocity of paſſing
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              a thouſand or two thouſand paces an hour: this in ſubſtance is
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              no other than if we had ſaid, ſuch a Fountain diſchargeth in an
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              hour a Water of a thouſand or two thouſand paces long. </s>
              <s>So
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              that, albeit the total length of Running water be incomprehen­
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              ſible, as being infinite, yet nevertheleſſe its rendered intelligible
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              by parts in its velocity. </s>
              <s>And ſo much ſufficeth to have hinted
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              about this matter, hoping to impart on ſome other occaſion other
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              more accurate Obſervations in this affair.</s>
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              LAVS DEO.
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