ABSTRACT
The use of tracers for investigation of “lost waters” dates back to the first century A.D. when Flavius Josephus, a Roman historian of Jewish descent, referred in War of the Jews to the method used to find the origin of the Jordan River: “Up to that time, the source of the Jordan River was not known until Philip Tetrarch Trahonitide proved its origin. Introducing chaffs in Fijala, they emerged at Panium, the same place that ancient people believed the source of the river should have been.”
