Marie Klodowska was born in Warsaw, in 1868. Her father was a professor of chemistry in the university of the former Polish capital; and it is undoubtedly from him that his brilliantly dowered daughter has inherited her love of chemistry and her extraordinary genius for scientific research. Owing to the paltry salary he received, Professor Klodowska was obliged to make little Marie his laboratory assistant while she was quite a young girl. Instead, then, of playing with tops and dolls, her time was occupied in cleaning evaporating dishes and test tubes and in assisting her father to prepare for his lectures and experiments. And it was thus that, at an early age, she acquired a taste for that science in which she was subsequently to achieve such world-wide fame. While still a young woman, her love of science drew her to Paris, where she arrived with only fifty francs in her purse. But, possessed of dauntless courage and unfaltering perseverance, she was prepared to make any sacrifice in the pursuit of knowledge. Her first home in the gay French metropolis was a poorly furnished garret in an obscure part of the city, and her diet was for so long a time restricted to black bread and skimmed milk that she afterward avowed that she had to cultivate a taste for wine and meat. And so intensely cold was her cheerless room in winter that the little bottle of milk which was daily left at her door was speedily congealed. At this time the poor girl was living on less than ten cents a day, but still cherishing all the while the fond hope that she might eventually secure a position as a student assistant in some good chemical laboratory. After a long struggle with poverty and after countless disappointments in quest of a position where she could gratify her ambition as a student of chemistry, she finally found occupation as a poorly paid assistant in the laboratory conducted by Professor Lipmann. She was not, however, at work a week before this distinguished investigator recognized in the young woman one whose knowledge of chemistry and faculty for original research were far above the average. She was accordingly transferred without delay from the menial employment in which she had been engaged and given every possible facility for prosecuting work as an original investigator.