In 1839 Scranton started to manufacture iron, and began experimenting with the practicability of smelting ore by means of "hard" or anthracite coal in Slocum Hollow (now Scranton, Pennsylvania).
In 1839, Scranton began producing iron and started testing the feasibility of smelting ore using "hard" or anthracite coal in Slocum Hollow (now Scranton, Pennsylvania).