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| <h2>IMPORTED REVISION FROM WIKISPACES</h2> | | <h2>IMPORTED REVISION FROM WIKISPACES</h2> |
| This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br> | | This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br> |
| : This revision was by author [[User:TallKite|TallKite]] and made on <tt>2018-01-19 21:18:13 UTC</tt>.<br> | | : This revision was by author [[User:TallKite|TallKite]] and made on <tt>2018-01-19 21:19:24 UTC</tt>.<br> |
| : The original revision id was <tt>625119281</tt>.<br> | | : The original revision id was <tt>625119305</tt>.<br> |
| : The revision comment was: <tt></tt><br> | | : The revision comment was: <tt></tt><br> |
| The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.<br> | | The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.<br> |
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| ||= (P8/3, P12/4) ||= third-8ve quarter-12th ||= 6 = 3L 3s * ||= 9 = 3L 6s * ||= 12 = 3L 9s * ||= || || || | | ||= (P8/3, P12/4) ||= third-8ve quarter-12th ||= 6 = 3L 3s * ||= 9 = 3L 6s * ||= 12 = 3L 9s * ||= || || || |
| ||= (P8/4, P4/4) ||= quarter-everything ||= 8 = 4L 4s * ||= 12 = 8L 4s * ||= ||= || || || | | ||= (P8/4, P4/4) ||= quarter-everything ||= 8 = 4L 4s * ||= 12 = 8L 4s * ||= ||= || || || |
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| About half of the quarter-split pergens have nothing but starred scales. The next table continues with fifth-splits, etc., showing only unstarred scales. It also excludes those MOS scales with L/s > 5.
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| ||||~ pergen ||||||||||~ MOS scales of 5-12 notes (unstarred scales only, L/s < 5 only) ||~ ||~ ||
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| ||||~ fifths ||~ ||~ ||~ ||~ ||~ ||~ ||~ ||
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| ||= (P8, P4/5) ||= fifth-4th ||= 8 = 1L 7s ||= 9 = 1L 8s ||= 10 = 1L 9s ||= 11 = 1L 10s ||= 12 = 1L 11s (or 11L 1s) ||= ||= ||
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| ||= (P8, P5/5) ||= fifth-5th ||= 6 = 1L 5s ||= 7 = 1L 6s ||= 8 = 1L 7s ||= 9 = 8L 1s ||= ||= ||= ||
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| ||= (P8, P11/5) ||= fifth-11th ||= 7 = 4L 3s ||= 11 = 7L 4s ||= ||= ||= ||= ||= ||
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| ||= (P8, P12/5) ||= fifth-12th ||= 7 = 3L 4s ||= 10 = 3L 7s ||= ||= ||= ||= ||= ||
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| ||= (P8, WW4/5) ||= fifth-WW4th ||= 7 = 2L 5s ||= 9 = 2L 7s ||= 11 = 2L 9s ||= ||= ||= ||= ||
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| ||= (P8/2, P4/5) ||= half-8ve fifth-4th |||||| 12 = 2L 10s (or 10L 2s) ||= ||= ||= ||= ||
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| ||||~ sixths ||~ ||~ ||~ ||~ ||~ ||~ ||~ ||
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| A MOS scale tends to be generated by just a few pergens. The table below shows the pergen that best corresponds to each MOS scale, as well as some others that could also generate the scale. The best pergen is the one that makes a reasonable L/s ratio. A ratio of 3 or more makes a scale that's too lopsided. | | A MOS scale tends to be generated by just a few pergens. The table below shows the pergen that best corresponds to each MOS scale, as well as some others that could also generate the scale. The best pergen is the one that makes a reasonable L/s ratio. A ratio of 3 or more makes a scale that's too lopsided. |
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| ||= 9L 1s ||= (P8, P4/2) [10] ||= quarter-4th decatonic ||< || | | ||= 9L 1s ||= (P8, P4/2) [10] ||= quarter-4th decatonic ||< || |
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| The pentatonic MOS scales don't include fifthj-split pergens, because a pentatonic genchain has only 4 steps, and can only divide a multigen into quarters. It would be possible to include pergens with a multigen which isn't actually generated. For example, 3L 2s using the sensei generator would be (P8, WWP5/7) [5]. The rationale would be that two sensei generators = 5/3, in effect a (P8, (5/3)/2) pseudo-pergen. | | The pentatonic MOS scales don't include fifth-split pergens, because a pentatonic genchain has only 4 steps, and can only divide a multigen into quarters. It would be possible to include pergens with a multigen which isn't actually generated. For example, 3L 2s using the sensei generator would be (P8, WWP5/7) [5]. The rationale would be that two sensei generators = 5/3, in effect a (P8, (5/3)/2) pseudo-pergen. |
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| Some MOS scales are better understood using a pergen with a nonstandard prime subgroup. For example, 6L 1s can be roulette [7], with a 2.5.7 pergen (P8, (5/4)/2), where 5·G = 7/4. | | Some MOS scales are better understood using a pergen with a nonstandard prime subgroup. For example, 6L 1s can be roulette [7], with a 2.5.7 pergen (P8, (5/4)/2), where 5·G = 7/4. |
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| </table> | | </table> |
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| <br />
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| About half of the quarter-split pergens have nothing but starred scales. The next table continues with fifth-splits, etc., showing only unstarred scales. It also excludes those MOS scales with L/s &gt; 5.<br />
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| <br />
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| <table class="wiki_table">
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| <tr>
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| <th colspan="2">pergen<br />
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| </th>
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| <th colspan="5">MOS scales of 5-12 notes (unstarred scales only, L/s &lt; 5 only)<br />
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| </th>
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| <th><br />
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| </th>
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| <th><br />
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| </th>
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| </tr>
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| <tr>
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| <th colspan="2">fifths<br />
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| </th>
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| <th><br />
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| </tr>
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| <tr>
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| <td style="text-align: center;">(P8, P4/5)<br />
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| </td>
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| <td style="text-align: center;">fifth-4th<br />
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| </td>
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| <td style="text-align: center;">8 = 1L 7s<br />
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| </td>
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| <td style="text-align: center;">9 = 1L 8s<br />
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| </td>
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| <td style="text-align: center;">10 = 1L 9s<br />
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| </td>
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| <td style="text-align: center;">11 = 1L 10s<br />
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| </td>
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| <td style="text-align: center;">12 = 1L 11s (or 11L 1s)<br />
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| </td>
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| <td style="text-align: center;"><br />
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| </td>
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| <td style="text-align: center;"><br />
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| </td>
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| </tr>
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| <tr>
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| <td style="text-align: center;">(P8, P5/5)<br />
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| </td>
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| <td style="text-align: center;">fifth-5th<br />
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| </td>
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| <td style="text-align: center;">6 = 1L 5s<br />
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| </td>
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| <td style="text-align: center;">7 = 1L 6s<br />
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| </td>
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| <td style="text-align: center;">8 = 1L 7s<br />
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| </td>
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| <td style="text-align: center;">9 = 8L 1s<br />
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| </td>
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| <td style="text-align: center;"><br />
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| </td>
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| <td style="text-align: center;"><br />
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| <td style="text-align: center;"><br />
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| </tr>
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| <tr>
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| <td style="text-align: center;">(P8, P11/5)<br />
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| </td>
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| <td style="text-align: center;">fifth-11th<br />
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| </td>
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| <td style="text-align: center;">7 = 4L 3s<br />
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| </td>
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| <td style="text-align: center;">11 = 7L 4s<br />
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| </td>
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| <td style="text-align: center;"><br />
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| </td>
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| <td style="text-align: center;"><br />
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| </tr>
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| <tr>
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| <td style="text-align: center;">(P8, P12/5)<br />
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| </td>
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| <td style="text-align: center;">fifth-12th<br />
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| </td>
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| <td style="text-align: center;">7 = 3L 4s<br />
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| </td>
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| <td style="text-align: center;">10 = 3L 7s<br />
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| </td>
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| <td style="text-align: center;"><br />
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| <td style="text-align: center;">(P8, WW4/5)<br />
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| </td>
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| <td style="text-align: center;">fifth-WW4th<br />
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| </td>
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| <td style="text-align: center;">7 = 2L 5s<br />
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| </td>
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| <td style="text-align: center;">9 = 2L 7s<br />
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| </td>
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| <td style="text-align: center;">11 = 2L 9s<br />
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| <td style="text-align: center;">(P8/2, P4/5)<br />
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| </td>
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| <td style="text-align: center;">half-8ve fifth-4th<br />
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| <td colspan="3">12 = 2L 10s (or 10L 2s)<br />
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| <td style="text-align: center;"><br />
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| <th colspan="2">sixths<br />
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| A MOS scale tends to be generated by just a few pergens. The table below shows the pergen that best corresponds to each MOS scale, as well as some others that could also generate the scale. The best pergen is the one that makes a reasonable L/s ratio. A ratio of 3 or more makes a scale that's too lopsided.<br /> | | A MOS scale tends to be generated by just a few pergens. The table below shows the pergen that best corresponds to each MOS scale, as well as some others that could also generate the scale. The best pergen is the one that makes a reasonable L/s ratio. A ratio of 3 or more makes a scale that's too lopsided.<br /> |
Line 4,383: |
Line 3,586: |
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| <br /> | | <br /> |
| The pentatonic MOS scales don't include fifthj-split pergens, because a pentatonic genchain has only 4 steps, and can only divide a multigen into quarters. It would be possible to include pergens with a multigen which isn't actually generated. For example, 3L 2s using the sensei generator would be (P8, WWP5/7) [5]. The rationale would be that two sensei generators = 5/3, in effect a (P8, (5/3)/2) pseudo-pergen.<br /> | | The pentatonic MOS scales don't include fifth-split pergens, because a pentatonic genchain has only 4 steps, and can only divide a multigen into quarters. It would be possible to include pergens with a multigen which isn't actually generated. For example, 3L 2s using the sensei generator would be (P8, WWP5/7) [5]. The rationale would be that two sensei generators = 5/3, in effect a (P8, (5/3)/2) pseudo-pergen.<br /> |
| <br /> | | <br /> |
| Some MOS scales are better understood using a pergen with a nonstandard prime subgroup. For example, 6L 1s can be roulette [7], with a 2.5.7 pergen (P8, (5/4)/2), where 5·G = 7/4.<br /> | | Some MOS scales are better understood using a pergen with a nonstandard prime subgroup. For example, 6L 1s can be roulette [7], with a 2.5.7 pergen (P8, (5/4)/2), where 5·G = 7/4.<br /> |
Line 4,712: |
Line 3,915: |
| <br /> | | <br /> |
| This PDF is a rank-2 notation guide that shows the full lattice for the first 15 pergens, up through the third-splits block.<br /> | | This PDF is a rank-2 notation guide that shows the full lattice for the first 15 pergens, up through the third-splits block.<br /> |
| <!-- ws:start:WikiTextUrlRule:5974:http://www.tallkite.com/misc_files/pergens.pdf --><a class="wiki_link_ext" href="http://www.tallkite.com/misc_files/pergens.pdf" rel="nofollow">http://www.tallkite.com/misc_files/pergens.pdf</a><!-- ws:end:WikiTextUrlRule:5974 --><br /> | | <!-- ws:start:WikiTextUrlRule:4891:http://www.tallkite.com/misc_files/pergens.pdf --><a class="wiki_link_ext" href="http://www.tallkite.com/misc_files/pergens.pdf" rel="nofollow">http://www.tallkite.com/misc_files/pergens.pdf</a><!-- ws:end:WikiTextUrlRule:4891 --><br /> |
| <br /> | | <br /> |
| Alt-pergenLister lists out thousands of pergens, and suggests periods, generators and enharmonics for each one. It can also list only those pergens supported by a specific edo. Written in Jesusonic, runs inside Reaper.<br /> | | Alt-pergenLister lists out thousands of pergens, and suggests periods, generators and enharmonics for each one. It can also list only those pergens supported by a specific edo. Written in Jesusonic, runs inside Reaper.<br /> |
| <!-- ws:start:WikiTextUrlRule:5975:http://www.tallkite.com/misc_files/alt-pergensLister.zip --><a class="wiki_link_ext" href="http://www.tallkite.com/misc_files/alt-pergensLister.zip" rel="nofollow">http://www.tallkite.com/misc_files/alt-pergensLister.zip</a><!-- ws:end:WikiTextUrlRule:5975 --><br /> | | <!-- ws:start:WikiTextUrlRule:4892:http://www.tallkite.com/misc_files/alt-pergensLister.zip --><a class="wiki_link_ext" href="http://www.tallkite.com/misc_files/alt-pergensLister.zip" rel="nofollow">http://www.tallkite.com/misc_files/alt-pergensLister.zip</a><!-- ws:end:WikiTextUrlRule:4892 --><br /> |
| <br /> | | <br /> |
| Screenshot of the first 38 pergens:<br /> | | Screenshot of the first 38 pergens:<br /> |
| <!-- ws:start:WikiTextLocalImageRule:3616:&lt;img src=&quot;/file/view/alt-pergenLister.png/624838213/704x460/alt-pergenLister.png&quot; alt=&quot;&quot; title=&quot;&quot; style=&quot;height: 460px; width: 704px;&quot; /&gt; --><img src="/file/view/alt-pergenLister.png/624838213/704x460/alt-pergenLister.png" alt="alt-pergenLister.png" title="alt-pergenLister.png" style="height: 460px; width: 704px;" /><!-- ws:end:WikiTextLocalImageRule:3616 --><br /> | | <!-- ws:start:WikiTextLocalImageRule:2872:&lt;img src=&quot;/file/view/alt-pergenLister.png/624838213/704x460/alt-pergenLister.png&quot; alt=&quot;&quot; title=&quot;&quot; style=&quot;height: 460px; width: 704px;&quot; /&gt; --><img src="/file/view/alt-pergenLister.png/624838213/704x460/alt-pergenLister.png" alt="alt-pergenLister.png" title="alt-pergenLister.png" style="height: 460px; width: 704px;" /><!-- ws:end:WikiTextLocalImageRule:2872 --><br /> |
| <br /> | | <br /> |
| <!-- ws:start:WikiTextHeadingRule:90:&lt;h2&gt; --><h2 id="toc19"><a name="Further Discussion-Misc notes"></a><!-- ws:end:WikiTextHeadingRule:90 -->Misc notes</h2> | | <!-- ws:start:WikiTextHeadingRule:90:&lt;h2&gt; --><h2 id="toc19"><a name="Further Discussion-Misc notes"></a><!-- ws:end:WikiTextHeadingRule:90 -->Misc notes</h2> |