Put in an open cask four gallons of warm rain-water, one gallon of common molasses and two quarts of yeast; cover the top with thin muslin and leave it in the sun, covering it up at night and when it rains. In three or four weeks it will be good vinegar. If cider can be used in place of rain-water the vinegar will make much sooner—will not take over a week to make a very sharp vinegar. Excellent for pickling purposes.
The Whitehouse Cookbook, by Mrs. F.L. Gillette (Year 1887)