Magnitudes in mathematics, 252. Main kinds of interest, 83–94; materials of, 95–104; process of, 105–130; plan of, 131–135. Manly games, effects of on boys, 183. Manual training, 259; effect of on discipline, 56. Many-sidedness, 66–70; of interest, 62. Materials of instruction, 95–104. Mathematics, 252–257; linked to nature, 39; correlation of, 39; aptitude for, 252. Mathematical teaching, order of, 255. Maxims, origin of, 310. McLellan and Dewey, 253. McMurray, 74. Measuring, 253. Mediæval history, 249. Memorizing, 81, 108. Memory of will, 161. Mental faculties, names for, 27. Mental instability, 301. Mephistopheles, 83. Method, 67. Mob spirit, the, 168. Mobility of ideas, 35. Modern history, 250. Modern languages, arguments for their study, 98. Modern methods of using text-books in history, 247. Money, teaching the use of, 170. Moodiness in the teacher, 166. Moods and whims, 147. Moral eccentricity, 307. Moral freedom, possibility of, 173. Moral education in strict sense, 188. Moral judgment, contempt of, 312. Moral revelation of the world, 167. Morality, demand of upon youth, 231. Mother-tongue, the, 269. Motives of youth, 229. Musical instruments, study of, 179. Narration, art of, 76; historical, 239–243. Natorp, 143. Natural science, 258–262. Nature study, 258–262; apperceptive basis for, 258; and history, 258. Niemeyer, 112, 113. Obedience, 48; to authority, 173; promptness of, 309. Object lessons, how to teach, 114–116. Observation, of children, 33, 34; exercises, 215; which does not observe, 111. Occupations, 47, 98; self-chosen, 134. “Odyssey,” 283. Offences, concealed, 316. One-sidedness, 86. Order, restoration of, 324. Organization of pupil’s ideas, 31, 32; of education, 330–347. Outlines of general pedagogics, 45–231. Outside occupations, 134. Overburdening of pupils, 97, 226.