General view of a Union Pacific Railroad car featuring Plexiglas panels concealed under metal screens. Per notations accompanying the photograph, this box car was used to test and measure the movement of the panels and…

General view of several unidentified employees installing Plexiglass panels on the nose of a Douglas A-20 attack bomber. Per notations accompanying the photograph, the two halves that form the nose of the bomber are…

General view of an unidentified female employee polishing a curved panel of Plexiglas designed for use as an aircraft windshield. This photograph was likely taken at the Rohm and Haas Company plant located in Bristol,…

General view of an unidentified male employee polishing a curved panel of Plexiglas designed for use on the nose of an aircraft attack bomber. Several finished panels are visible in the background. Per notations…

General view of an unidentified employee fitting a Plexiglas windshield panel onto the nose enclosure of a Douglas A-20 attack bomber. This photograph was likely taken at the Rohm and Haas Company plant located in…

General view of two unidentified employees working on the nose of a Douglas A-20 attack bomber aircraft prior to the installation Plexiglas windshield panels. This photograph was likely taken at the Rohm and Haas…

General view of Plexiglas plotting and status boards in use at an Air Force communications school located at Keesler Field in Biloxi, Mississippi. As visible in the photograph, personnel receive reports from radar…

General view of an unidentified employee using a router to smooth the edge of a curved Plexiglas panel designed for use as an aircraft windshield. Per notations accompanying the photograph, the edges of the panels are…

General view of an unidentified employee using a band saw to trim a curved Plexiglas panel designed for use as an aircraft windshield. This photograph was likely taken at the Rohm and Haas Company plant located in…

General view of two unidentified employees making adjustments to a Douglas A-20 attack bomber in production at the Rohm and Haas Company plant located in Bristol, Pennsylvania. Several attack bombers, awaiting…

General view of an unidentified female employee polishing a curved panel of Plexiglas designed for use as an aircraft windshield. This photograph was likely taken at the Rohm and Haas Company plant located in Bristol,…

Four photographs depicting various German automobiles with Plexiglas windshields and window panels. Per notations accompanying the photographs, the automobiles are identified as follows: 1) Opel Super 6…

Aerial view of the Rohm and Haas Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the Northeast section of Philadelphia, Pennsylvania.

General view of a Triton kettle located in Building 26 of the Rohm and Haas Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the Northeast section of Philadelphia,…

Photographic album containing 41 photographs depicting the facilities and grounds of the Charles Lennig and Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the…

Group portrait of employees at the Charles Lennig and Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the Northeast section of Philadelphia, Pennsylvania. Charles…

General view of the exterior of the clubhouse facility at the Charles Lennig and Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the Northeast section of…

General view of the exterior of the bowling alley at the Charles Lennig and Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the Northeast section of Philadelphia,…

General view of the exterior of the completed methol amines plant (Building 22) at the Charles Lennig and Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the…

General view of the construction of the methol amines plant (Building 22) at the Charles Lennig and Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the Northeast…

General view of the exterior of the Amberol manufacturing facility (Building R1) at the Charles Lennig and Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the…

General view of the plant locomotive at the Charles Lennig and Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the Northeast section of Philadelphia, Pennsylvania.…

General view of the exterior of the semi-works facility at the Charles Lennig and Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the Northeast section of…

General view of the exterior of the orthochrome facility (Building 58) at the Charles Lennig and Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River in the Northeast…

General view of the exterior of the machine (Building 56) and carpenter shops (Building 57) at the Charles Lennig and Company chemical manufacturing plant in Bridesburg, a neighborhood located along the Delaware River…