Mastoidectomy is a surgical procedure to remove an infected portion of the bone behind the ear when medical treatment is not effective. This surgery is rarely needed today because of the widespread use of antibiotics.astoidectomy is a surgical procedure to remove an infected portion of the bone behind the ear when medical treatment is not effective. This surgery is rarely needed today because of the widespread use of antibiotics.
The Germans had little choice â few other places besides the United States allowed German immigration. Unlike the Irish, many Germans had enough money to journey to the Midwest in search of farmland and work. The largest settlements of Germans were in New York City, Baltimore, Cincinnati, St. Louis and Milwaukee.n the decade from 1845 to 1855, more than a million Germans fled to the United States to escape economic hardship. They also sought to escape the political unrest caused by riots, rebellion and eventually a revolution in 1848.
This white paper assesses immigrationâs economic impact based on the professional literature and concludes that immigration has a positive effect on the American economy as a whole and on the income of native-born American workers. Key Findings. 1  On average, US natives benefit from immigration. 2  Careful studies of the long-run fiscal effects of immigration conclude that it is likely to have a modest, positive influence. 3  Skilled immigrants are likely to be especially beneficial to natives.