The history of an industrial community marks itself into three divisions: (1) the movement from the country into the city, (2) the building up of enterprises or commercial concerns, (3) the conservation of waste products. The movement of the people from the country to the city carries with it a number of problems. Many of these would not be met with in the country.
Proceedings of the Iowa Academy of Science
©1913 Iowa Academy of Science, Inc.
Bakke, A. L.
"The Effect of Smoke and Gases upon Vegetation,"
Proceedings of the Iowa Academy of Science, 20(1), 169-188.
Available at: https://scholarworks.uni.edu/pias/vol20/iss1/14