Josiah Warren, of Cincinnati, is the patentee of a lamp on a new plan, which is said, to a single family, will produce an annual saving of 20 dollars. Its light is clear and pleasant, and the volume of flame equal to that of two common candles.
“Weekly Summary,” The Plough Boy, and Journal of the Board of Agriculture, 2, 52 (May 26, 1821), 415.
