Hinshelwood, J., 64, 97. Hollingworth, H. L., 41, 47. Hollingworth, L. S., 13, 113. Huey, E. B., 57. Illustrative cases, of defect in reading, 65 f., 71 f.; of talent in reading, 91 f.; of defect in spelling, 109 f.; of special ability in spelling, 111; of special defect in arithmetic, 119 ff.; of lightning calculators, 122 ff.; of marked ability to calculate, combined with high IQ, 131 ff.; of special ability in drawing, 154 ff.; of mirror writing, 189. Individuality, values of, 196 f.; compulsory education and, 198; cost of fostering, 206; rewards of fostering, 208. Intellect, organization of, 11 f.; inheritance of, 27; uses of, 197 f. IQ, determination of, 34 ff.; significance of, 36; nervous stability and, 70. _See also_ General intelligence. Ivanof, E., 147, 163. Jones, E. E., 145, 163. Jones, F., 186. Judd, C. H., 115, 210. Kallom, A. W., 113. Keller, H., 69, 90, 96. Kerschensteiner, G., 163. Kik, C., 163. King, I., 97. Knock, C. J., 181. Kreuger, F., 47. Kries, J. Von, 181. Ladd, G., 51, 56, 96. Lanterne, S., 140. Lashley, K. S., 56. Lazar, E., 140. Leadership, 192. Lee, V., 182. Left-handedness, 183 ff. Lightning calculators, 115 ff. Lindley, E. H., 128, 140. Linguistic functions, loss of, 51; complexity of, 52; coherence among, 98. Lip-movements, 60. Literacy, 94. Máday, H. V., 140. Manuel, H. T., 141, 144, 145, 150, 151, 163. Martha, precocious reader, 92. Mathematical ability, 115, 118. Mayberry, L. W., 211. McCall, W. A., 33, 47. Mechanical ability, 190. Mechanical tests, 85. Mechanics, of reading, 58 ff.; of arithmetic, 120. Mendel, G., 27. Mendelian inheritance, 27, 176, 185. Mental age, 35, 39. Mental endowment, origin of, 3; when first evident, 42. Mental functions, speculation concerning, 1; definition of, 4; complexity of, 6; believed to have common factor, 15; believed to be specialized, 16; selective enfeeblement of, 21 ff.; attempted localization of, 49 ff. Mental measurement, ideals of, 36; present limitations of, 37. Mental tests, foretold, 1; defined, 34; present limitations of, 37 f. Merton, E., 96. Meumann, E., 10, 11, 98, 144, 163. Meyer, M., 164. Miller, G. A., 140. Mirror writing, 188 f. Mitchell, F. B., 123, 129, 137, 140. Möbius, P. J., 140. Monakow, C. Von, 51, 56. Moore, T. V., 24, 25, 47. Morgan, W. P., 63, 96. Music, nature of, 164; various kinds of, 165; appreciation of, 180. Musical sensitivity, 166. Nervous instability, and reading, 69; and arithmetic, 122. Nervous system, 49. Neurotic children, 69, 122. Non-reader, four-year study of, 71 f. Non-readers, summary of studies of, 89 f. Oakland schools, organization of, 204. O’Brien, J. A., 97. Ophthalmologists, reports of, 59. Pannenberg, H. J., 163, 166, 182. Pannenberg, W. A., 163, 166, 182.