This study reconstructs the image of the 'normal' child in Ontario from 1867 to 1900. During this time period the 'normal' child was modeled after the idealized image of a bourgeois adult. The idealized bourgeois adult was the embodiment of Protestantism, industriousness, decency, and culture. Any deviation from this image usually meant delinquency, or lunacy, or both, on the part of the child and brought about jail-time or committal to asylums. A combination of religious, economic, political, and legal beliefs provided the conditions necessary for the emergence of this image. This reconstruction not only aims to contribute to the social history of 'adolescence' in Canada, but also it seeks to point out the historical variability of conceptions of adolescence normality and abnormality and, thereby, help to broaden the existing views of mental health and disorder.Keywords Normal . Abnormal . Child . Adolescence . Mental health In The Harvard Guide to Psychiatry Nicholi (1999) points out: (1) the criteria of onset and end of adolescence is unsettled, (2) there are as many definitions of adolescence as authors writing about it, (3) the exact nature of adolescence, of what is normal and what is abnormal, is still vague, and (4) our view of adolescent pathology and treatment of it is also unclear. Of the last of these he writes: "If we look carefully at these criteria, we see that adolescence can end at 18 years of age or continue throughout life" (Nicholi 1999, pp. 612-613). He identifies, furthermore, the following as the "adolescent behavior patterns": search for identity, drug use, suicide, sexuality, being fond of cars and motorcycles (Nicholi 1999, pp. 618-623); and as for adolescents ' 'adjustment disorders' he cites: depression, anxiety, truancy, vandalism, reckless driving (Nicholi 1999, pp. 618-623).When it comes to adolescent behavior standard works in psychology, social psychology and sociology do not fare any better. They speak of it in no certain terms as a period of playfulness, sexual surge, laziness and impudence "with brutality lurking just below the surface and ready to break out into violence" (Friedenberg 1972, pp. 31-32); a 'transitional stage' between childhood and adulthood, ridden with conflicts and tensions (Berger 1972);