A man high on scaffolding is cleaning the outside of a tower of the Allegheny County Courthouse and Jail. The line between the cleaned bricks and dirty bricks is visible, showing the degree of difference. See images SCLS015-SCLS018 for other views of th
Pittsburgh City Photographer Collection, 1901-2002, AIS.1971.05, Archives Service Center, University of Pittsburgh
Allegheny County Courthouse and Jail (Pittsburgh, Pa.)--Pictorial works.; Downtown (Pittsburgh, Pa.); Air--Pollution--Pennsylvania--Pittsburgh--History.; Air quality management--Pennsylvania--Pittsburgh--History.
Public Domain - Anybody may use this photo for any purpose