Passing over, then, all the lesser feminine lights in chemistry who, in various fields of activity, have rendered such distinct service during the past generation, we come to one who for nearly two decades has stood in the forefront of the great chemists of the world. This is that renowned daughter of Poland, Mme. Marie Klodowska Curie, whose name will always be identified with some of the most remarkable discoveries which have ever been made in the long-continued study of the material universe.
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.
It was shortly after this event that Marie Klodowska met the noted savant, Pierre Curie. He was not long in discovering in her a kindred spirit—one who, besides having exceptional talent in experimental chemistry, was actuated by an ardent love of science. It was then that he determined to make her his wife. A single sentence in a letter he wrote at this time to the object of his admiration and affection reveals, better than anything else, the devotion of this matchless pair in the cause of science. "What a great thing it would be," he exclaims, "to unite our lives and work together for the sake of science and humanity." These simple words were the keynote to the ideal life led by this incomparable couple during the eleven years they worked together in perfect unity of thought and aspiration before the sudden and premature extinction of the husband's life gave such a shock to the entire scientific world.
After her marriage the gifted young Polish woman had reached the goal of her ambition. She was able to devote herself exclusively to what was henceforth to constitute her life work in one of the best laboratories of Paris, that of the École de Physique et de Chimie, and that, too, in collaboration with her husband, from whom she was never separated during the entire period of their married life for even a single day.
It was about this time that Mme. Curie had her interest aroused by the brilliant discoveries of Röntgen and Becquerel regarding radiant matter. After a long series of carefully conducted experiments on the compounds of uranium and thorium, she, with the intuition of genius, opened up to the world of science an entirely new field of research. But she soon realized that the labor involved in the investigations which she had planned was entirely beyond the capacity of any one person. It was then that she succeeded in enlisting her husband's interest in the undertaking which was to lead to such marvelous results.
Confining their work to a careful analytical study of the residue of the famous Bohemian pitchblend—an extremely complex mineral, largely composed of oxide of uranium—they soon found themselves confronted by most extraordinary radio-active phenomena. Continuing their researches, their labor was rewarded by the discovery of a new element which Mme. Curie, in her enthusiasm, named in honor of the land of her birth, polonium.
As their investigations progressed, they became correspondingly difficult. They were dealing with substances which exist in pitchblend residue only in infinitesimal quantities—not more than three troy grams to the ton. The difficulties they had to contend with were enough to discourage the stoutest heart. Few believed in their theories, while the majority of those who had some intimation of the character of their work were persuaded that they were pursuing a phantom. But the indefatigable pair toiled on day and night and continued their experiments through long years of poverty and deferred hopes.