Interior view of the Hazard Powder Company saltpeter refinery
Photograph taken by Thompsonville (Enfield), Connecticut professional photographer N.P. Palmer showing the exterior of the Hazard Powder Company's saltpeter refinery. Raw saltpeter (potassium nitrate), one of the three ingredients of black powder, was imported from various locations around the world and then refined (purified) in this building.
2012.10.12-13