Galilei, Galileo, The systems of the world, 1661

Table of figures

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              ous rayes, nor can this their inadvertency be excuſed, in regard
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              that it was in their power to have beheld them at their pleaſure
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              without thoſe treſſes, which is done, by looking upon them at
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              their firſt appearance in the evening, or their laſt occultation in
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              the comming on of day; and if none of the reſt, yet
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              Venus,
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              which oft times is ſeen at noon day, ſo ſmall, that one muſt
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              pen the ſight in diſcerning it; and again, in the following night,
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              ſeemeth a great flake of light, might advertiſe them of their
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              lacy; for I will not believe that they thought the true
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              Diſcus
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              to
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              be that which is ſeen in the obſcureſt darkneſſes, and not that
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              which is diſcerned in the luminous
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              Medium
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              : for our lights, which
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              ſeen by night afar off appear great, and neer at hand ſhew their
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              true luſtre to be terminate and ſmall, might have eaſily have
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              made them cautious; nay, if I may freely ſpeak my thoughts, I
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              abſolutely believe that none of them, no not
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              Tycho
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              himſelf, ſo
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              accurate in handling Aſtronomical Inſtruments, and that ſo great
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              and accurate, without ſparing very great coſt in their
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              ction, did ever go about to take and meaſure the apparent
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              meter of any Star, the Sun and Moon excepted; but I think,
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              that arbitrarily, and as we ſay, with the eye, ſome one of the
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              more antient of them pronounced the thing to be ſo and ſo, and
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              that all that followed him afterwards, without more ado, kept
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              cloſe to what the firſt had ſaid; for if any one of them had
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              plied himſelf to have made ſome new proof of the ſame, he would
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              doubtleſſe have diſcovered the fraud.</s>
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              A common
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              rour of all the
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              ſtronomers,
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              ing the magnitude
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              of the ſtars.
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              Venus
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              renders the
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              errour of
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              mers in
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              ing the magnitudes
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              of ſtars
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              ble.
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              <s>SAGR. </s>
              <s>But if they wanted the Teleſcope, and you have
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              ready ſaid, that our
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              Friend
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              with that ſame Inſtrument came to
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              the knowledge of the truth, they ought to be excuſed, and not
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              accuſed of ignorance.</s>
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              <s>SALV. </s>
              <s>This would hold good, if without the Teleſcope the
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              buſineſſe could not be effected. </s>
              <s>Its true, that this Inſtrument by
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              ſhewing the
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              Diſcus
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              of the Star naked, and magnified an
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              dred or a thouſand times, rendereth the operation much more
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              ſie, but the ſame thing may be done, although not altogether ſo
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              exactly, without the Inſtrument, and I have many times done
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              the ſame, and my method therein was this. </s>
              <s>I have cauſed a rope
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              to be hanged towards ſome Star, and I have made uſe of the
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              Conſtellation, called the
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              Harp,
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              which riſeth between the North
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              and ^{*} North-eaſt, and then by going towards, and from
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              the ſaid rope, interpoſed between me and the Star, I have found
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              the place from whence the thickneſſe of the rope hath juſt hid
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              the Star from me: this done, I have taken the diſtance from the
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              eye to the rope, which was one of the ſides including the angle
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              that was compoſed in the eye, and ^{*} which inſiſteth upon the
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              thickneſſe of the rope, and which is like, yea the ſame with the </s>
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