▁Ir ont on ▁Rail road . ▁ ▁During ▁the ▁ 1 8 9 0 s , ▁as ▁the ▁local ▁lim on ite ▁industry ▁decl ined ▁and ▁rail road ▁transport ation ▁improved , ▁Thomas ▁Iron ▁switched ▁from ▁using ▁local ▁ore ▁to ▁h emat ite ▁from ▁Michigan ▁or ▁over se as . ▁However , ▁they ▁continued ▁to ▁use ▁New ▁Jersey ▁magnet ite . ▁By ▁ 1 8 9 1 , ▁the ▁company ' s ▁Richard ▁Mine ▁was ▁the ▁largest ▁producer ▁of ▁ore ▁in ▁New ▁Jersey . ▁The ▁decl ining ▁importance ▁of ▁local ▁ore ▁also ▁prompt ed ▁C rane ▁and ▁Thomas ▁to ▁div est ▁themselves ▁of ▁the ▁Cat as au qua ▁and ▁F og els ville : ▁ 6 0 % ▁of ▁the ▁stock ▁in ▁the ▁rail road ▁was ▁sold ▁to ▁the ▁Reading ▁in ▁ 1 8 9 0 , ▁which ▁le ased ▁it ▁in ▁ 1 8 9 3 . ▁▁ 1 8 9 1 ▁also ▁marked ▁the ▁beginning ▁of ▁another ▁round ▁of ▁up gr ades , ▁adding ▁Dur ham - style ▁reg ener ative - he ating ▁st ov es ▁to ▁No . ▁ 6 ▁and ▁No . ▁ 7 ▁stack s . ▁In ▁ 1 8 9 3 , ▁No . ▁ 1 ▁and ▁No . ▁ 2 ▁stack s ▁were ▁abandoned : ▁No . ▁ 1 ▁was ▁demol ished ▁and ▁re built ▁with ▁the ▁new ▁st ov es , ▁which ▁were ▁also ▁added ▁to ▁No . ▁ 1 0 ▁and ▁No . ▁ 1 1 ▁furn aces ▁( former ▁Sau con ▁Iron