circumferentor
...that a circumferentor was an important tool to surveyors for mapping the North American frontier?
...that a <b id="mwBqo"><a href="./Circumferentor" id="mwBqs" rel="mw:WikiLink" title="Circumferentor">circumferentor</a></b> was an important tool to <a href="./Surveying" id="mwBqw" rel="mw:WikiLink" title="Surveying">surveyors</a> for <a href="./Cartography" id="mwBq0" rel="mw:WikiLink" title="Cartography">mapping</a> the <a href="./North_America" id="mwBq4" rel="mw:WikiLink" title="North America">North American</a> <a href="./Frontier" id="mwBq8" rel="mw:WikiLink" title="Frontier">frontier</a>?