Refers to this paper.
DAIRY SUPPLIES, Etc.
THE
CHICAGO CREAMERY.
The 1st claim of the Chicago Creamery and Rectangular Can is, that the can has from 250 to 332 more of cooling surface than any round can in use.
2d. It will cool milk to temperature of water surrounding it in one hour.
3d. It will raise all the cream in ten hours with the water 50 to 55 degrees; no round can can do this in ten hours with ice.
4th. No round or square can containing 4½ gallons of milk, or over, will give as much cream from 100 pounds of milk as this Rectangular.