The book which you are most likely referring to is Edith Wharton's Age of Innocence.
Edith Wharton
Depends on where you are. This would be considered middle class in cities like New York and San Fransisco. But in most other locations, it would be considered upper middle class.
upper-class New York City in the 1870s
The ISBN of New York - novel - is 9781846051951.
For household of 4, above $100,000. For a single earner, above $65,000. This is also dependent on where you are. The incomes I stated above would not be considered upper middle class in New York or San Fransisco, but in most other locations, they are.
The Outlook - New York - was created in 1870.
York Spit Light was created in 1870.
New York - novel - has 1040 pages.
"Slob" is a novel by Ellen Potter that takes place in New York City. The story is set in the Upper West Side of Manhattan.
New York - novel - was created on 2009-09-03.
Mainly they went to get a better life in New York. In the upper class, especially first, it was more for holidays or business trips, but third class had a poor life in England or France and wanted to see if they could get a better life than their old one in New York.
Lawrence York Spear was born on 1870-10-23.