Sun rays It has been asserted, from actual experience, by a number of men, that birth marks, tattoo marks, moles and all other permanent skin blemishes may be removed by burning glasses concentrating the rays of the sun on the affected parts. Great care must be used not to make the burn too severe, and consequently it must be frequently repeated. If the mere surface is charred by the heat without injuring the tissue the result will be, so it is claimed, a complete removal of these disfiguring marks. Some men even claim that outside cancers are more benefited by this treatment than by the X-rays. This is known as solar therapy. Its advocates, some of them, even say that cancer can be cured by this method. It is probably true that all of the various rays made by machinery are present in the solar ray. But this therapy is still an almost unknown land. Too much of any ray will do harm, so will the solar ray, and it must be employed with caution. It is well for the operator to use colored glasses to protect his eyes for the concentrated ray is blinding in its brilliancy.