From where did Jacob Riis migrate from?

What caused 2 cuased disaster to the farmers from Europe and US?

What percent of the US population were immigrants?

Which program did the government create for immigrants to adapt to the US?

What new architecture was presented to the overcrowded cities?

In what year was the street car presented to the public

Where did people without plumbing collect water?

In what year did New York create it's first police force?

What state organised it's first fire department?