The health effects of high exposure to radon in mines, where exposures reaching 1,000,000 Bq/m3 can be found, can be recognized in Paracelsus' 1530 description of a wasting disease of miners, the mala metallorum. Though at the time radon itself was not understood to be the cause—indeed, neither it nor radiation had even been discovered—mineralogist Georg Agricola recommended ventilation of mines to avoid this mountain sickness (Bergsucht).[30][31] In 1879, the "wasting" was identified as lung cancer by Herting and Hesse in their investigation of miners from Schneeberg, Saxony, Germany. Given that the type locality of the important uranium ore pitchblende is in the Ore Mountains and that region was the most important German speaking mining area at the time, it is likely the radon induced lung cancers were associated with uranium.