As gray hairs create, even in persons still young, an elderly appearance, it might appear to their advantage to color them. It is best to use such coloring only in regions of small extent rather than in a general way. As the most inoffensive coloring of gray hair among dark hair, I would consider the preparations containing nitrate of silver. Those which contain lead or copper should be condemned. After all the best weapon against old looks is a hygienic life by which we can best avoid the development of a condition which already at an early age gives an old aspect to the tissues, i.e., of arteriosclerosis, or hardening of the arteries. RAPID AND EARLY DEATH THROUGH ARTERIOSCLEROSIS AND ITS PREVENTION. For most arteriosclerotic persons there can be only little hope to live up to a green old age, to become 80 or 90 years old or even to pass on to still higher years. But there are exceptions not so very seldom, and it gives comfort to my patients suffering from this disease and apprehension of the future, when I tell them that nearly all the brothers and sisters of both my parents suffered from this disease for many years, which did not prevent them from attaining ages varying between 80 and 96 years and more. My father ever after his forty-fifth year suffered from attacks of asthma. As a child I was often awakened through his nightly asthmas, but in spite of many symptoms of arteriosclerosis he lived to a great age. One of my aunts is still living, not very far from 100 years old, although suffering in a high degree from arteriosclerosis for many years. Such protracted cases generally happen in families of longevity and they are only due to, as a rule, regular habits, although it is true that my father was a great smoker in his younger years and even in his last years enjoyed one or two light cigars daily.