My dad's cousins had an ice house in Midland MI. He said they cut blocks of ice out of the river and stored it separated with straw. He said it was one of their favorite places to go during the summer.Ice was originally harvested in the winter from lakes and stored in a cold house for use in the summer. I think artificial ice means that it was frozen using a refrigeration system.
In the early 1960s, Dad got a call from his mother - the electric refrigerator (from the 1930s) had suddenly "developed an odor."They were expensive and could leach dangerous chemicals into your food.