Ice, Iceboxes, and Keeping Food Cold in Summer

How did households keep food cold before refrigerators?

An icebox was an insulated wooden cabinet lined with metal, with a compartment for a block of ice and space for food. Cold air sank from the ice over the food, and meltwater drained into a pan that had to be emptied. Fresh ice arrived on a delivery route. Households often put a card in the window to signal how large a block they wanted. Cold storage was a running expense and a limited resource, which is why so much historical food preservation never relied on cold at all.

The ice itself began as a frozen pond. In winter, workers cut blocks from lakes and rivers, packed them in icehouses insulated with sawdust or straw, and sold them through spring and summer. Frederic Tudor of Boston, later called the Ice King, helped turn that local practice into an industry. In 1806 he shipped New England ice to Martinique. Early cargoes melted and lost money, but better insulation and destination icehouses made the trade profitable. By mid-century, tens of thousands of tons moved by ship and rail each year, and iceboxes were common even in city apartments.

Homes also used naturally cool spaces. Cellars, springhouses, and north-facing pantries stayed cooler than the rest of the house and held dairy, produce, and other perishables for days, not months.