▁The ▁extension ▁of ▁the ▁rail road ▁to ▁Mount ▁Car bon ▁in ▁ 1 8 4 2 ▁facil itated ▁the ▁movement ▁of ▁raw ▁materials ▁and ▁finished ▁goods ▁that ▁helped ▁P ott st own ' s ▁economy ▁grow . ▁In ▁a ▁few ▁years ▁after ▁the ▁extension ▁of ▁the ▁rail road , ▁the ▁population ▁grew ▁from ▁ 6 0 0 ▁to ▁ 1 , 8 5 0 . ▁P ott st own ' s ▁metal ▁production ▁grew ; ▁steel ▁from ▁the ▁bor ough ▁was ▁used ▁in ▁the ▁Pan ama ▁Canal ▁and ▁Golden ▁Gate ▁Bridge . ▁ ▁In ▁ 1 9 4 4 , ▁the ▁bor ough ▁adopted ▁a ▁city ▁manager ▁form ▁of ▁government . ▁By ▁ 1 9 6 4 , ▁the ▁bor ough ▁saw ▁the ▁need ▁to ▁re organ ize ▁the ▁municipal ▁government . ▁At ▁the ▁time , ▁it ▁had ▁one ▁of ▁the ▁largest ▁bor ough ▁coun c ils ▁in ▁the ▁state , ▁with ▁ 2 0 ▁members . ▁This ▁was ▁reduced ▁to ▁seven ▁members ▁in ▁red ra wn ▁w ards . ▁ ▁The ▁High ▁Street ▁Historic ▁District , ▁Old ▁P ott st own ▁Historic ▁District , ▁Pot ts gro ve ▁M ansion , ▁Gr ub b ▁M ansion , ▁Jefferson ▁Element ary ▁School , ▁P ott st own ▁Rol ler ▁Mill , ▁Reading ▁Rail road ▁P ott st own ▁Station , ▁and ▁Henry ▁An tes ▁House ▁are ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places . ▁ ▁Polit ics ▁and ▁government ▁P ott st own ▁has ▁a ▁city ▁manager ▁form ▁of ▁government ▁with ▁a ▁mayor