Which economic conditions in the North contributed to the Great Migration?

There were also factors that pulled migrants to the north, such as labor shortages in northern factories brought about by World War I, resulting in thousands of jobs in steel mills, railroads, meatpacking plants, and the automobile industry.

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aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on