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Miss Dorothy Ehmke, conducting urea tests on the blood of pregnant rats as part of a study of the effect of meat diets on toxemic pregnancy in rats. In the research lab in the home economics department at Iowa State College. Ames, Iowa

Miss Dorothy Ehmke, conducting urea tests on the blood of pregnant rat...

Public domain photograph of college lab, free to use, no copyright restrictions image - Picryl description

Production. Plywood for aircraft and boats. Strong, light plywood for our fighting planes. An exact and even spread of urea glue is applied by machine onto the crossboards of lumber-core panels to permit attaching of wood veneers in a Midwest plant. Louisville, Kentucky

Production. Plywood for aircraft and boats. Strong, light plywood for ...

Public domain photograph - working class people, the 1930s United States, work, labor, worker, free to use, no copyright restrictions image - Picryl description

Production. Plywood for aircraft and boats. Strong, light plywood for our fighting planes. An exact and even spread of urea glue is applied by machine to strips of wood veneer to permit attachment to lumbercore panels in a Midwest plant. Louisville, Kentucky

Production. Plywood for aircraft and boats. Strong, light plywood for ...

Public domain photograph of indoor, interior activity, America in the 1930s, free to use, no copyright restrictions image - Picryl description