How The Hot Dog Became An Echt-American Food

From an 1894 news article: “More numerous than the lunch wagon is the strolling salesman of ‘red hots.’ … [The immigrant vendor] carries a tank in which are swimming and sizzling hundreds of Frankforters or Wieners. These mysterious denizens of the steaming deep are sold for five cents, which modest charge includes an allowance of horseradish or some other tear-producing substance.”