Ice Machines, Steamboats, and Education:Structural Change And Educational Technologies
Paul Horwitz likes to remind us that the first ice making machines were introduced when everyone used iceboxes to store food. Ice companies delivered blocks of ice for these iceboxes once or twice a week. Of course, the first ice machines were used by the ice companies to make ice for home iceboxes. It took decades until the ice companies vanished and everyone had personal ice machines, called refrigerators.