It appears that ladies who are past thirty-five years of age are peculiarly sensitive to the effect of a bright light striking upon their heads from above. The skull of a woman is quite different from that of a man, especially on the top, and at the age of thirty-five, the texture of the skull at this place becomes very light. Rays of light--especially electric light--have a peculiarly penetrating and disturbing effect upon the cerebral nerves. Strange to say, this infirmity is never felt by a young woman, but as soon as she passes the heyday of youth, it is at once perceptible. The fact is generally known to women, and discussed among themselves, but they have jealously guarded the secret, even from their nearest male relatives and friends. The lady physician who recently exposed the matter in a scientific journal is the first of her sex to make it known to the public. If anyone will take the trouble to make a test of the statement, its truth will be unquestionably proven. Engage a woman of middle age in conversation beneath a well-lighted chandelier, and in a few moments she will grow uneasy, and very soon the pain inflicted by the light will cause her to move away from under its source. On young and healthy girls the rays of light have no perceptible effect. So, when we see a lady at a theater wearing a tall and cumbersome hat, we should reflect that she is more than thirty-five years old, and is simply protecting herself from an affliction that advancing years have brought upon her. Whenever we observe one wearing small and unobtrusive headgear we know that she is still young and charming, and can yet sit beneath the rays of penetrating light without inconvenience. No man who has had occasion to rail against woman's supposed indifference to the public comfort in this respect, will hesitate to express sincere regret that he has so misunderstood them. It is characteristic of Americans to respect the infirmities of age, especially among the fair sex, and when the facts here narrated have been generally known, pity and toleration will take the place of censure. Henceforth a tall hat, with nodding feathers and clustering flowers and trimming, will not be regarded with aversion when we see it between us and the stage, but with respect, since we are assured that its wearer is no longer young, but is already on the down hill of life, and is forced to take the precaution that advancing years render necessary to infirm women. A Startling Demonstration What a terrible state of affairs it would be if we could read each other's minds! It is safe to say that if such were the case, most of us would be afraid to think above a whisper.