120 THE FEEBLY INHIBITED. 



the extreme types. The romantics are characterized by precocity, the 

 classics are more retarded in their development. The romantic men 

 of science produce rapidly and much and require surroundings which 

 afford them a stimulus. They are full ol ideas and readily impart 

 them to others. They attract students and impart their enthusiasm 

 to them. They become famous teachers, like Louis Agassiz in America. 

 They have a wealth of ideas, plans, and problems with which their 

 pupils are kept busy. They are of ready assistance to their pupils, 

 being full of suggestions to help them in their difficulties. The classics, 

 on the other hand, work better alone. They are of little use to any 

 but their profoundest pupils, and they publish relatively little, but 

 what they publish is philosophical and finished. Helmholtz was of 

 this type. He was always a poor teacher, despite his vast knowledge, 

 his extensive experience, and his creative genius; for he reacted not 

 on the spot, but only after some time. If a student in his laboratory 

 laid a question before him he promised to think over it, and gave his 

 answer some days later and often so elaborately and fully wrought out 

 that the pupil could see no relation of the reply to his problem. One 

 thinks also of the great physician, Rowland, of Johns Hopkins Univer- 

 sity, who, when asked what he proposed to do with his students, said, 

 "I shall neglect them." Such men of science thrive best in compara- 

 tive isolation. These two types thus depicted among men of science 

 are really to be found in the general population. In business, the bold, 

 energetic, dashing promoter and the solid, conservative, thrifty mer- 

 chant; in law, the emotional jury-lawyer and the learned judge; in 

 medicine the skillful operator in difficult cases and the skilled diagnos- 

 tician and consultant; in divinity, the magnetic evangelist and the 

 profound theologian or exegetist; in war a dashing Sheridan and a 

 solid, quiet Grant. The romantic and the classic type— the hyper- 

 kinetic and the hypokinetic, the radical and the conservative, the 

 feebly-inhibited and the strongly-inhibited constitute a dualism that 

 runs through our whole population; and this difference will, I predict, 

 prove to be due to hereditary factors, even as proves to be the case in 

 the manic-depressive syndrome. 



Finally, it is interesting that the old popular nomenclature of tem- 

 peraments — choleric, nervous, phlegmatic, melancholic — should prove 

 so suitable to our case and to fall so in line with the findings of heredity. 

 Owing to the circumstance that all behavior is colored by other factors 

 than simple temperament, and that experience, no doubt, introduces 

 modifications, all persons who fall into the same one of our 9 classes do 

 not react in precisely the same way. For instance, some drink and 

 others do not; some tend to run away and others to stay at home; 

 some show violent temper, others have sick headaches, others are highly 

 erotic, and so on. But, wending its way through the forest of hereditary 

 factors in human behavior is the well-marked trail of the hereditary 



