Some strange phenomena of polarity are related. The following experiments by MM. Binet and Fere are given in illustration: "We give a patient in somnambulism the common hallucination of a bird poised on her finger. While she is caressing the imaginary bird she is awakened and a magnet is brought near her head. After a few minutes she stops short, raises her eyes and looks about in astonishment. The bird which was on her finger has disappeared. She looks all over the ward and at last finds it, for we hear her say, 'So you thought you would leave me, little bird.' After a few minutes the bird again disappears anew, but almost immediately reappears. The patient complains from time to time of a pain in the head at a point corresponding to what has been described in this book as the visual centre (some distance above and slightly posterior to the ear)." The magnet also has the same effect in suspending the real perception. One of the patients was shown a Chinese gong and striker, and took fright on sight of the instrument. When a blow was struck she instantly fell into catalepsy. She was reawakened, and asked to look attentively at the gong; meanwhile, without her knowledge, a small magnet was brought near her head. After a minute the instrument had completely disappeared from her sight. When it was struck with redoubled force, she only looked from side to side with an air of slight astonishment. * * * * * The mysteries which puzzle these writers are made plain by anthropology, and I have been presenting the explanation for over forty years to my pupils. The sensibility to hypnotic phenomena is due to the anterior portion of the middle lobe of the brain--to the portion which is developed one inch behind the external angle of the eye, by exciting which we bring on the somnolent condition. The predominance of this region renders the person liable to the mesmeric phenomena. The hypnoscope proposed is quite unnecessary. The proper test of magnetic susceptibility is either to excite the organ of somnolence and observe if the eyes are disposed to close, or to pass your fingers over the outstretched hand of the subject, within one or two inches, and observe if he feels any impression. A distinct feeling of coolness is sufficient proof of magnetic susceptibility.