The document is a chapter from a history textbook titled "The Age of the City". It covers the major developments in American cities between 1860-1920, including rapid urbanization and immigration, the growth of industries and infrastructure in cities, the rise of mass consumption, and cultural and social changes in urban areas. Key topics discussed include immigration patterns, the development of ethnic neighborhoods, public health issues in cities, the impact of new technologies, the growth of leisure and popular culture, and the rise of urban higher education.