Selling 'em by the Sack: White Castle and the Creation of American Food - David G. Hogan - Google Books

http://books.google.de/books?id=PT6s4ZbznHMC&pg=PA17&dq=hotdog+feltman+1867&hl=de&sa=X&ei=W_JHU7mmDOLMygPYiYCwDQ&ved=0CGcQ6AEwBA

In the wake of World War I, the hamburger was still considered a disreputable and undesirable food. Yet by 1930 Americans in every corner of the country accepted the hamburger as a mainstream meal and eventually made it a staple of their diet. The…