Harriot, Thomas, Mss. 6789

List of thumbnails

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201
201 (101r) 		202
202 (101v)
203
203 (102r) 		204
204 (102v)
205
205 (103r) 		206
206 (103v)
207
207 (104r) 		208
208 (104v)
209
209 (105r) 		210
210 (105v)
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page |< < (537r) of 1074 > >|
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          <pb file="1071.jpg" o="537r" n="1071"/>
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          <p>
            <s xml:space="preserve"> But if half a poynt had been greater, then it had varied
              <lb/>
            the contrary way by the differences.
              <lb/>
            If the former rules be well understode there cannot happen
              <lb/>
            any case concerning this variation, but you may very well
              <lb/>
            know
              <emph style="st">what to do adding or</emph>
            when to adde or subtracte
              <lb/>
            & what is don by them, if you will use that means. you
              <lb/>
            have your choyse;
              <emph style="st">[???]</emph>
            so that
              <lb/>
            I need not be more </s>
          </p>
          <p>
            <s xml:space="preserve"> This means of
              <emph style="st">of</emph>
            observing the variation of all others
              <emph style="super">generall</emph>
            most redy easy
              <lb/>
            & certayne; the way that they use by observing the north
              <emph style="super">upon a northesat guard</emph>
            is not true but
              <lb/>
            only
              <emph style="st">about the [???]</emph>
              <emph style="super">in the latitude</emph>
            of 40 & 50 degrees because there only he is in the
              <lb/>
            meridian or [???], which to all seamen is a paradox. & to affirme the starre
              <lb/>
            by the compasse when he is hye is very uncertayne; but when he is
              <lb/>
            it is a goode meanes to attayne to the variation nere hand neither
              <lb/>
            do I wishe it to be refused,
              <emph style="st">as</emph>
            being under the hygh of 20 degrees.
              <lb/>
            & at
              <emph style="super">a</emph>
            NE & SW guard. So likewise is it to be preferred before any single
              <lb/>
            observation that is made [???] of the sonne
              <emph style="super">or starre</emph>
            when they
              <emph style="st">it</emph>
              <emph style="super">are</emph>
            many degrees
              <emph style="st">observa-</emph>
              <lb/>
              <emph style="st">tion</emph>
            hye or any doble of the forenoone & afternoone; which are only goode
              <lb/>
            at land where the horizon can not be seene
              <emph style="st">& the </emph>
            & when this way can
              <lb/>
            not be used of which way as others have written
              <emph style="super">by the sonne</emph>
            specially M
              <emph style="super">r</emph>
            w: Borrowes in his
              <lb/>
            booke of the variation annexed to Normans new </s>
          </p>
          <p>
            <s xml:space="preserve"> Besides the benefit that it hath in shewing your true course, it
              <lb/>
            will hereafter be a meanes to observe the longitude
              <emph style="st">to of</emph>
            sufficiently
              <lb/>
            exact, & therefore I wish it the more to be </s>
          </p>
          <p>
            <s xml:space="preserve"> By the table also of the sonnes Amplitude with the rules before may be
              <lb/>
            found the variation of the compasse by the moone or any starre whose
              <lb/>
            inclination
              <emph style="st">is not gi</emph>
            may be found in the </s>
          </p>
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