Doable Boiler Made in Two Sizes

The Caloric utensils are made of pure aluminum and, as is well known, this material will discolor under certain conditions. As a rule, hot water and pure soap will keep utensils in perfect condition, but if these are not sufficient, the vessels may easily be cleaned with some good scouring soap. Water or food containing alkali or iron will discolor the inside of aluminum utensils. Among the foods which contain alkali are potatoes, from which the skins have not been removed; corn on the cob, etc., and these are quite sure to discolor the aluminum utensils.

This discoloration is harmless and will have no effect upon the food. It does, however, mar the appearance of the aluminum and every good housekeeper likes to have her utensils bright and clean. If food or grease adheres to the aluminum surface it may easily be soaked loose by allowing hot water to stand in the vessel for several hours and scraping with a wooden spoon; or if necessary, with very fine sand or powdered emery.