Condensed milk by John Spottiswood.

This is sold in cans, and comes either whole or nonfat. Don't confuse it with sweetened condensed milk , which has lots of sugar and is not a good substitute. While evaporated milk is sometimes called condensed milk, most recipes that call for condensed milk are referring to sweetened condensed milk. Evaporated milk is sold with varying amounts of butterfat, ranging from whole evaporated milk with about 8% to skim evaporated milk with about 0.5%. To reconstitute evaporated milk, combine it with an equal amount of water.