The Weston iHorn is made from a Weston Electric Company, of Newark, New Jersey Ammeter which was made in 1901. An ammeter (from Ampere Meter) is a measuring instrument used to measure the current in a circuit. Electric currents are measured in amperes, hence the name. By the late 19th century, improved instruments were designed which could be mounted in any position and allowed accurate measurements in electric power systems. The Weston iHorn uses a vintage Christmas horn as the horn. The letters P.S.P & L Co. mean that at one point in time the Weston was owned by Puget Sound Power & Light Company. The Weston was both a teaching tool and a tool of the trade which reminds us that we are never to old to learn and that the world is a laboratory of fascination.