<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>B. Fried</dc:contributor>
  <dc:contributor>John Guptil</dc:contributor>
  <dc:creator>Robert E. Wallace</dc:creator>
  <dc:date>1954</dc:date>
  <dc:description>&lt;p&gt;A&lt;span&gt;&amp;nbsp;drafting instrument which provides&amp;nbsp;&lt;/span&gt;a&lt;span&gt;&amp;nbsp;ruling edge for drawing arcs of circles the radii of which are unusually long is described.&amp;nbsp;&lt;/span&gt;A&lt;span&gt;&amp;nbsp;complete range of arcs of different curvature, within the limits prescribed by the construction of the instrument, are obtainable. This instrument was developed originally to allow accurate construction of&amp;nbsp;&lt;/span&gt;circular&lt;span&gt;&amp;nbsp;arcs of very low curvature, which are difficult or impossible to draw with an ordinary compass,&amp;nbsp;&lt;/span&gt;in&lt;span&gt;&amp;nbsp;&lt;/span&gt;constructing&lt;span&gt;&amp;nbsp;&lt;/span&gt;stereographic&lt;span&gt;&amp;nbsp;&lt;/span&gt;projections&lt;span&gt;. It is apparent, of course, that numerous other applications are possible. To satisfy the authors' needs,&amp;nbsp;&lt;/span&gt;a&lt;span&gt;&amp;nbsp;relatively small model was constructed, but the same general construction could be used&amp;nbsp;&lt;/span&gt;in&lt;span&gt;&amp;nbsp;larger models.&amp;nbsp;&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1029/TR035i004p00645</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>American Geophysical Union</dc:publisher>
  <dc:title>A variable, circular‐arc rule; An aid in constructing stereographic projections</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>