What groups immigrated in record numbers to the united states between 1820 and 1850?

Do some research to further analyze the impact of the industrial revolution. look for information that describes both the positive and negative effects of the industrial revolution. you can use the websites listed below to conduct your research. the first three websites provide descriptions of working conditions during the industrial revolution. the last website describes technological advances of the era. if you like, look for other sites that provide information on the topic.1. 2. 3. ~histwhs/h114.dir/h114.webreader/h114.read.m.mines.html4.