Carl Johan Cronstedt
... that Carl Johan Cronstedt increased the efficiency of wood-burning stoves in the 18th century by a factor of eight?
... that <b id="mwB8U"><a class="new" data-mw-i18n='{"title":{"lang":"x-page","key":"red-link-title","params":["Carl Johan Cronstedt"]}}' href="./Carl_Johan_Cronstedt?action=edit&amp;redlink=1" id="mwB8Y" rel="mw:WikiLink" title="Carl Johan Cronstedt" typeof="mw:LocalizedAttrs">Carl Johan Cronstedt</a></b> increased the <a href="./Energy_conversion_efficiency" id="mwB8c" rel="mw:WikiLink" title="Energy conversion efficiency">efficiency</a> of <a href="./Wood-burning_stove" id="mwB8g" rel="mw:WikiLink" title="Wood-burning stove">wood-burning stoves</a> in the <a href="./18th_century" id="mwB8k" rel="mw:WikiLink" title="18th century">18th century</a> by a factor of eight?