Describe the patterns of immigration from 1820-1860, 1880-1924, and 1965-2000.

they were all immigrants

the answer would be logic.

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