19. Showing the psychograph of a stupid child, who has a special ability in representative drawing. (From Manuel’s _A Study of Talent in Drawing_. Reproduced by courtesy of The Public School Publishing Company.) 155 20. Showing special ability in drawing of a 14-year-old boy, of IQ near 70 156 21. Showing special ability in drawing of a 14-year-old boy, of IQ near 70 157 22. Showing the special ability to cut silhouettes, of a feeble-minded man, inmate of an institution for mental defectives 159 23. Charlie Chaplin pursuing a gentleman, and pursued by a policeman. Showing the special ability to draw, of a feeble-minded man, in an institution for mental defectives 160 24. Showing attempts by two distinguished university professors to cut silhouettes of an elephant 161 25. Psychograph of G, showing special ability in music and drawing combined with mediocre intelligence 177 26. Psychograph of M, showing special defect in music combined with very superior general intelligence 179 27. Showing mirror writing by public school pupils. (From Beeley’s _An Experimental Study of Left-Handedness_. Reproduced by courtesy of the University of Chicago Press.) 189 EDITOR’S INTRODUCTION