cane. - Monocular estimation of distance. - Difficult without parallax. Law of corresponding points. — Each ganglion cell two neurons, divide for both retina. — Orientation, with prism. — Diplopia: — physiological at distances farther or nearer than point fixed. — Analogy of digital tactile sense.— - Binocular estimation of distance. - Fusing successive double images. — Coördination of convergence and accommodation. - Stereoscopic perspective. — Pictures correspond to right and left retinal images. Convergence required to fuse, determines distance; convergence excessive, nearness; convergence slight, distance. — May overcome mathematical perspective. - Binocular vision an acquired faculty. - Fusion training. The amblyoscope. — Phoro-optometer stereoscope. Controlled reading
- Nerve sleep, so called by Braid, 1843. — Phenomena are as old as civilization.-Early religions show many instances. Evident in religious fanaticism of to-day. - Mesmer. "De Planetarium Influxa,” 1776. — The action and virtue of animal magnetism.- The Paris establishment; mystery. Investigation by Academy of Sciences: "Not worthy of further scientific investigation." - Second investigation of mesmerism. — Eliotson, 1837, University Hosp., London. Resignation and publication of journal. - Esdaile, 1845, India. — Painless surgery. — Braid, 1843, 'Neurypnology." Rechristened" Hypnotism." - Result of subjective causes. Liébeault, 1864, Nancy, socalled "school."—Charcot, 1878, Salpêtrière school.Society for Psychic Research, 1882, International. Bramwell, England, best living exponent. Quackenboss, New York, moral reformation. - Morton Prince, Boston, multiple personalities. - Petersen, Boston, translator of Wetterstrand. — Sidis, Brookline, "Psychology