▁lim estone ▁flux ▁for ▁the ▁furn aces , ▁until ▁now ▁obtained ▁from ▁local ▁dol om it ic ▁lim estone ▁quar ries , ▁was ▁now ▁replaced ▁by ▁high - cal ci um ▁l ime ▁from ▁Ann ville , ▁Pennsylvania , ▁elimin ating ▁the ▁last ▁local ▁source ▁of ▁raw ▁materials . ▁ ▁S weet ser ▁left ▁the ▁presiden cy ▁on ▁July ▁ 1 , ▁ 1 9 1 6 , ▁and ▁was ▁succeeded ▁by ▁William ▁A . ▁Bar rows , ▁Jr ., ▁but ▁the ▁company ▁was ▁now ▁in ▁terminal ▁decl ine . ▁Ke yst one ▁F urn ace ▁was ▁sold ▁off ▁to ▁the ▁Northern ▁O re ▁Company ▁on ▁June ▁ 2 8 , ▁ 1 9 1 7 . ▁On ▁December ▁ 4 , ▁ 1 9 1 7 , ▁the ▁Thomas ▁Rail road ▁was ▁merged ▁into ▁the ▁Ir ont on , ▁which ▁by ▁this ▁time ▁primarily ▁carried ▁c ement ▁instead ▁of ▁iron ▁ore . ▁In ▁ 1 9 1 8 , ▁the ▁No . ▁ 1 1 ▁stack ▁( former ▁Sau con ▁Iron ) ▁was ▁re built , ▁but ▁No . ▁ 1 0 ▁was ▁abandoned . ▁ ▁D ism ant ling ▁of ▁the ▁company ▁now ▁began ▁in ▁earnest : ▁the ▁last ▁iron ▁was ▁made ▁at ▁Alb urt is ▁in ▁ 1 9 2 1 , ▁at ▁which ▁time ▁H ok end au qua ▁was ▁also ▁out ▁of ▁bl ast . ▁No . ▁ 1 1 ▁at ▁Hell ert own ▁produced ▁a ▁small ▁quantity . ▁On ▁June ▁ 3 0 , ▁ 1 9