Ireland and Irish Emigration to the New World from 1815 to the Famine. William Forbes Adams. Mass immigration to the United States was nowhere more apparent than in the immigration of the Irish between 1815 and the failure of the potato crop in 1845/1846, during which time a million Irish men and women crossed the seas to take up permanent residence in America. Adams provides a detailed account of the economic, social, and political factors underlying the early migrations; an examination of the emigrant trade and its links with American shipping interests; and a history of government policy regarding assisted and unassisted emigration. An exhaustive and engaging book. 1932, (2008), paper, 452 pp.