▁anth rac ite ▁as ▁the ▁principal ▁furn ace ▁fuel . ▁No . ▁ 7 ▁and ▁ 8 ▁stack s ▁at ▁Alb urt is ▁were ▁re put edly ▁the ▁last ▁furn aces ▁in ▁the ▁country ▁to ▁use ▁anth rac ite , ▁converting ▁to ▁co ke ▁in ▁ 1 9 1 4 . ▁The ▁shift ▁away ▁from ▁local ▁or es ▁and ▁fu els ▁elimin ated ▁much ▁of ▁the ▁original ▁compet itive ▁advantage ▁of ▁the ▁Le high ▁Valley ▁furn aces . ▁ ▁Again st ▁this ▁back drop , ▁President ▁F ack ent hal ▁res igned ▁on ▁May ▁ 1 , ▁ 1 9 1 3 , ▁after ▁recomm ending ▁a ▁program ▁of ▁retr en ch ment ▁and ▁abandon ment ▁of ▁the ▁old ▁furn aces ▁at ▁Alb urt is . ▁His ▁successor , ▁chosen ▁on ▁July ▁ 1 , ▁ 1 9 1 3 , ▁was ▁Ralph ▁H . ▁S weet ser , ▁who ▁held ▁largely ▁opposite ▁views . ▁S weet ser ▁modern ized ▁not ▁only ▁No . ▁ 1 ▁and ▁No . ▁ 3 ▁stack s ▁at ▁H ok end au qua , ▁but ▁the ▁old ▁No . ▁ 7 ▁stack ▁at ▁Alb urt is . ▁He ▁also ▁attempted ▁to ▁restart ▁local ▁lim on ite ▁min ing , ▁an ▁effort ▁which ▁proved ▁a ▁cost ly ▁failure . ▁By ▁ 1 9 1 5 , ▁No . ▁ 6 ▁stack ▁at ▁H ok end au qua ▁had ▁been ▁abandoned ▁( le aving ▁only ▁No . ▁ 1 ▁and ▁No . ▁ 3 ▁in ▁operation ▁there ). ▁The