Show FEW P OPLE HAVE EVER SEEN RADIUM Radium is a metal that is described described described des des- as having a white metallic metal- metal lic ic lustre It has been peen isolated but jut once or twice and few perSons persons persons per per- sons have seen it It is ordinary r ily ly obtained from its ores in the thein thein thein in the form of sulphate chloride or bromide according to the United States Geological Survey Department of the Interior and it is s in the form of these s salts that it is usually so sold d and used These are all white or nearly white substances who vho e ance is no more remarkable than that th t of common salt or baking p Tubes containing radium radium rad rad- ium salts glow mostly because they include im impurities ties which th the ons from the radium t cause t to to give light Radium minerals are are very rarely if ever over luminescent |