=C. Differences in Temperament.=--All four types of temperament given in the formal classification are represented among children in school. The _choleric_ type is energetic, impulsive, quick-tempered, yet forgiving, interested in outward events. The _phlegmatic_ type is impassive, unemotional, slow to anger, but not of great kindness, persistent in pursuing his purposes. The _sanguine_ type is optimistic, impressionable, enthusiastic, but unsteady. The _melancholic_ type is pessimistic, introspective, moody, suspicious of the motives of others. Most pupils belong to more than one class. Perhaps the two most prominent types represented in school are (1) that variety of the sanguine temperament which leads the individual to think himself, his possessions, and his work superior to all others, and (2) that variety of the melancholic temperament which leads the individual to fancy himself constantly the victim of injustice on the part of the teacher or the other pupils. A pupil of the first type always believes that his work is perfectly done; he boasts that he is sure he made a hundred per cent. on his examinations; what he has is always, in his own estimation, better than that of others. When the teacher suggests that his work might be better done, the pupil appears surprised and aggrieved. Such a child should be shown that he is right in not being discouraged over his own efforts, but wrong in thinking that his work does not admit of improvement. A pupil of the second type is continually imagining that the teacher treats him unjustly, that the other pupils slight or injure him, that, in short, he is an object of persecution. Such a pupil should be shown that nobody has a grudge against him, that the so-called slights are entirely imaginary, and that he should take a sane view of these things, depending more upon judgment than on feeling to estimate the action of others toward him.