THE marvelous properties of radium led to experiments on the part of physicians and scientists based on the hope that the rays from this mysterious metal might afford relief for such grave afflictions as cancer and blindness. But after a thorough trial of its potency as a curative agency for these ills it is announced that the hopes which had been entertained are without foundation. From Germany, where experiments on the blind have been conducted, the report is made that radium rays have no effect toward the restoration of lost vision; and in London hospitals the use of radium in cancer treatment has been abandoned under the conviction that it is a waste of effort. In spite of all that the world of modern science can do, cancer still remains the dark continent of medical knowledge.