FamilySearch’s Research Wiki has a comprehensive overview of immigration and emigration in England. This includes backgroud information along with a comprehensive list of resources to help your research effort.
If you are researching English ancestors, this will be a useful resource. Visit England Emigration and Immigration Genealogy at FamilySearch Wiki.
From Findmypast . . .
United States Naturalization Petitions contains more than 7.8 million records spanning the years 1905 to 1950. The collection currently covers four states: Connecticut, Massachusetts, New York, and Pennsylvania, and allows you to discover when and where your immigrant ancestor was born, how old they were when they first crossed the Atlantic and their port of entry. Images of the original documents may even include a photograph of your ancestor.
Source: United States Naturalization Petitions – Findmypast – Genealogy, Ancestry, History blog from Findmypast