Males, dancing of, fighting and killing young, designation of, voice of, _See_ Sex Manège movements, Mark, E L, cages, Maze _See_ Labyrinth Measurements, of light, of rapidity of habit formation, of intelligence, of efficiency of training, Memory, defined, for ladder climbing, tests of, measurements of, span of, for brightness, for color, Method, of studying dance, for testing hearing, indirect, for testing vision, motives, for brightness vision, for color vision, of shifting filters, of testing form discrimination, of testing Weber's law, development of methods, of choice, food box, labyrinth, of recording errors, of training problem method, labyrinth method, discrimination method, of recording labyrinth path, qualitative versus quantitative, of studying senses, values of methods, of measuring intelligence, quantitative, comparisons of, Milne-Edwards, origin of dancer, Mitsukun, K, the dancer in Japan, Mixed whirlers, Modifiability, of behavior, of useless acts, index of, Motives, for activity, for choice, avoidance of discomfort, in labyrinths, desire to escape, to get food, to avoid pain, Motor, tendencies, ability, capacity Movements, of ears, _Mus musculus L_, _Mus spiciosus L_, _Mus sylvaticus L_. _Nankin nesumi_, name for dancer, Negation, choice by, Nendel, R, gray papers, Nerve, eighth, Nervous system, Nest materials, Noises, effects of, Numbers, odd for females, even for males, reference, _See_ Bibliographic List. Odors, discrimination by, Old Fancier's description of dancer, Olfactory sense _See_ Smell Orange-blue tests, Orientation of dancer, Origin of dancer; by selectional breeding; by inheritance of an acquired character; by mutation; by pathological changes; by natural selection. Panse, R., structure of ear; explanation of deafness. Papers, Nendel's grays; Bradley's colored; Hering's colored. Parker, G. H. Path in labyrinth, record of. Pathological condition of dancer. Pedagogy, comparative. Perception, of brightness; of color; of movement; of form. Peru, dancers in. Petromyzon, semicircular canals of. Photometer, Lummer-Brodhun. Plasticity of dancer; curves of. Position choice by, of cardboards. Preference for brightness, tests of. Preliminary tests. Probable error. Problems, of structure; of method. Punishment versus reward. Putting-through, training by. Qualitative methods. Quantitative methods.