A note on Roentgen's X-ray absorption measurements in 1895.
D005858:Germany; D049672:History, 19th Century; D006801:Humans; D007854:Lead; D008670:Metals; D010984:Platinum; D011839:Radiation, Ionizing / Q000266:history*; D011874:Radiometry / Q000266:history; D014965:X-Rays / Q000266:history*
D008670:Metals; D007854:Lead; D010984:Platinum