It remains to mention certain important services that radium may render in the cure of bodily ills, notably of lupus and other skin diseases. Here is a great new field full of promise, yet one that must be considered with guarded affirmation, lest false hopes be aroused. It is too soon as yet to say more than this, that distinguished doctors speak with confidence of excellent results that may be looked for from the radium treatment. Dr. Danlos, for instance, has used the radium rays on lupus patients at the St. Louis Hospital in Paris for over a year, and in several cases has accomplished apparent cures. The radium used is enclosed between two small discs of copper and aluminium, the whole being about the size of a silver dollar. The aluminium disc, which is very thin, is pressed against the affected part and left there for fifteen minutes; that is all there is in the treatment, except cleansing, bandaging, etc. Day after day, for weeks or months, this contact with the disc is continued, and after a period of irritation the sores heal, leaving healthy white scars. Some patients thus treated have gone for months without a relapse, but it is too soon to declare the cures absolute. They _look like_ absolute cures, that is all Dr. Danlos will say, and if time proves that they _are_ absolute cures, then radium will do for lupus patients all that Finsen's lamps do, and will do it more quickly, more simply, and with no cumbersome and costly apparatus. It may be objected that radium also is costly, but the answer is that radium will probably become cheaper as the supply increases and as the processes of extracting it are perfected. Furthermore, the effects of radium may be obtained, as already stated, by the use of indifferent bodies rendered radio-active, so that lupus patients may be treated with a piece of wood or a piece of glass possessed for the moment of the virtues of radium. And certain kinds of cancer may be similarly treated; indeed, a London physician has already reported a case of cancer cured by radium. These are possibilities, _not_ certainties, and there are others. It appears that radium has a bactericidal action in certain cases, and it would therefore seem reasonable that air rendered radio-active may benefit sufferers from lung troubles if breathed into the lungs, or that water rendered radio-active may benefit sufferers from stomach troubles if taken into the stomach. It goes without saying that in all these cases the use of radium must be attended with extreme precautions, so that harmful effects may be avoided.