Similar to a double boiler, this set of pots was used to heat hide glue, an adhesive made by boiling animal connective tissue. The larger pot is marked "Marietta, PA" on its exterior. Both pots have curved wire handles.
This brass preserving kettle is believed to be about 150 years old. The wire handle is attached with two copper screws at each side. Kettles such as this were used in the process of preserving fruit by cooking the fruit with sugar.