Before broaching the subject of this lecture, I should like to recall that the discoveries of radium and of polonium were made by Pierre Curie in collaboration with me.
We mainly producing in golf radium simulator, gradienter simulator of golf club, velometer of golf club, bags of golf balls and clothes, golf shoes, golf hats and other relative products.
We found that pitchblende contains at least two radioactive materials, one of which, accompanying bismuth, has been given the name polonium, while the other, paired with barium, has been called radium.