MME. CURIE, whose death occurred on July 4 after a brief illness, held an outstanding position in science, for she had long been regarded as the foremost woman investigator of our age. Although her greatest scientific work, the discovery and isolation of radium, was done nearly thirty years ago, yet, as professor in the Sorbonne and director of the Radium Institute in Paris, Mme. Curie until the time of her death was actively engaged in researches on the physical and chemical properties of the radioactive bodies. At the same time, she was also director of a vigorous school of research which attracted investigators from many countries. During the last few years, she was engaged in preparing preparations of actinium much stronger than had previously been available, for the purpose of examining the fine structure of the a-ray groups emitted by the products of this element. With the help of her colleague, Dr. Rosenblum, and the use of the large Paris electro-magnet, many new results of importance were obtained.