Centripetal Spring Armchair
... that the Centripetal Spring Armchair of 1849 , one of the first modern office chairs, was unsuccessful outside the US because it was considered immorally comfortable?
... that the <b id="mwCrE"><a href="./Centripetal_Spring_Armchair" id="mwCrI" rel="mw:WikiLink" title="Centripetal Spring Armchair">Centripetal Spring Armchair</a></b> of 1849 <i id="mwCrM">(pictured)</i>, one of the first modern <a href="./Office_chair" id="mwCrQ" rel="mw:WikiLink" title="Office chair">office chairs</a>, was unsuccessful outside the US because it was considered immorally comfortable?