Patent for a new and improved cooler. This design "consist[s] of the main vessel adapted to contain the substance to be cooled, having its upper end open and the walls of said open end drawn or inclined inward, as described, the water vessel supported on said main vessel, with a space between its bottom and the top of the main vessel, and made larger at its bottom than the upper open end of the main vessel, and the enveloping-sheet arranged to be wet by the contents of the water-vessel and extended past the space between the said vessels, whereby to protect the contents of the main vessel" (lines 79-92).