"Since the preliminary announcement of the discovery of radium, Giese has devoted a great deal of attention to the separation of radium, polonium, and other active bodies from pitchblende. ...Using the method of fractional crystallization of the bromide instead of the chloride he has been able to prepare considerable quantities of pure radium. By this means the labor of final purification of radium has been much reduced. He states that six or eight crystallizations with the bromide are sufficient to almost completely free the radium from the barium."