There is often ascribed to the blind a somewhat mystical sense, by which they can tell the presence and even the nature of objects, and can feel their way. As far as such a power exists, it depends upon a complex group of sensations, and includes the cultivation of the irradiation sense, which we all possess. It is not at all difficult to tell whether a large object is within a few inches of the hand, by the fact that it modifies the air currents and heat radiations reaching the hand. This is especially the case if the temperature of the object be somewhat different from that of the room, or if it be an object like metal, which rapidly exchanges its heat. In sunlight the shadows of stones and posts can be thus detected; and the illumination of a room, both as to its source and extent, can be judged. This sense the blind carefully, though often unconsciously, cultivate, and I have heard it spoken of by them as "facial perception," because the face seems to be most sensitive to this kind of change. Many mention that the power fails them under the influence of a headache or similar nervousness. The question whether the position of a door, whether opened or closed, could be told at a distance was variously answered; about half testified that they could do so mainly by the aid of this facial perception. This enters in a vague way into their dreams, but seldom plays an important rôle. The stories attributing to the blind rather wonderful notions of color have, on careful examination, been readily explained by natural means; the use of words referring to color is often merely verbal (of this both Laura Bridgman and Helen Keller furnish many excellent examples), while the knowledge of the colors of special objects is obtained by inference, based upon texture, appropriateness, and similar characteristics. The analogies between color and sound have been frequently described within recent years. Mr. Galton has recorded many cases in which the sounds of the vowels, of words, of musical notes, and the like, immediately summon to the mental eye an appropriate color, often with a peculiar outline and shading. One person could actually read sounds out of a wall-paper pattern, or write the sounds in the name _Francis Galton_ in colors. It seemed possible that the blind might obtain or receive some dim notions of color by a similar process; and Dr. Kitto and the blind teacher, Friedrich Scherer, mention that such is the case, though to a very slight extent. The latter calls musical instruments the bridge across which color comes to him. (He became blind when two years old.) The flute is his symbol of green, the swelling organ tones of blue. The trumpet is red, the hunter's horn dark green and violet, a general confusion of tones is gray, while pink and crimson are associated with the feeling of velvet. In my list occurs the record of a young man twenty years old, and blind for three years. He saw colors on