
In 1925, Hajduszoboszlo, during a search – drilling for oil; thermal water appeared from the depth, 1100 m, at 75-celsius degrees. According to the analyses it turned out that the water contained iodine, bromine, salt, hydrocarbon as well as bitumen ( including estrogen) and different trace elements: vanadium, copper, zinc, silver, strontium, barium, lead.