Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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he ſhall plainly ſee, who ſhall have underſtood my Book of the
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Meaſure of Running Waters And this was the Reaſon why all
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the Countrey did grow dry upon the opening of the Mouth into
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the Sea. </
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>And here I propoſe to conſideration that which the Pea
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ſants about
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Piſa
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relate, namely, That the Water in the Fields
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doth no conſiderable harm by continuing there five or ſix, yea, or
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eight dayes. </
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>And therefore the work of the Countrey is to o
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pen the Mouth of
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Fiume morto,
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in ſuch manner, that the Water
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being come, they may have the Trench free and ready, when that
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the Water cometh it may have a free drain, and may not ſtay
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there above eight or nine dayes, for then the overflowings be
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come hurtful. </
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>It is to be deſired alſo, that if any Propoſition is
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produced touching theſe affairs, it might be propounded the moſt
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diſtinctly that may be poſſible, and not conſiſt in generals, eſpe
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cially when the Diſpute is of the riſings, of velocity, of tardity,
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of much and little water; things that are all to be ſpecified by
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meaſures.</
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>6. Your Letter ſaith, in the next place, that
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Signore Barto
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lotti
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confeſſeth, that if the Mouth of the
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Fiume morto
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might al
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wayes be kept open, it would be better to let it continue as it is:
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the which, that I may not yield to him in courteſie, I confeſſe,
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for the keeping it ſtopt on all ſides would be a thing moſt per
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nicious. </
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>But admitting of his confeſſion I again reply, that
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Fi
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ume morto
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ought not to be let into
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Serchio,
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but immediately in
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to the Sea; becauſe although ſometimes the Mouth to Sea
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wards be ſtopt up, yet for all that, the raiſing of the Bank above
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the Plains (which is all the buſineſſe of importance) ſhall be ever
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leſſer, if we make uſe of the Mouth leading to the Sea, than u
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ſing that of
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Serchio.
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>7. I will not omit to mention a kinde of ſcruple that I have
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concerning the poſition of
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Sign. </
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<
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>Bartolotti,
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that is, where he ſaith
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that the two Mouths A and D are equal to the like Mouths into
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the Sea; Now it ſeems to me, that the Mouth A of
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Fiume morto
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into
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Serchio
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is abſolutely within
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Serchio,
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nor can it be made low
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er, and is regulated by the height of
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Serchio
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: But the Mouth
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of
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Fiume morto
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terminates, and ought to be underſtood to ter
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minate in the Sea it ſelf, the loweſt place. </
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>And this I believe
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was very well peroeived by
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Sig. </
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<
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>Bartolotti,
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but I cannot tell why
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he paſt it over without declaring it: and we ſee not that the
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Mouth D falleth far from the Sea, which Mouth ought to be let
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into the Sea it ſelf, and ſo the advantage of the
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M
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outh into the
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Sea more clearly appeareth.</
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<
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>8. That which
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Sig. </
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<
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>Bartolotti
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addeth, that when it is high
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Waters, at ſuch time as the Waters are out, and when Winds
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choak up
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Fiume morto,
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they not only retard it, but return the </
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