114 THE GLANDS REGULATING PERSONALITY 



normal function, it holds the balance of power. In every emer- 

 gency it stands out by its strength or by its weakness. It thus 

 creates its own type of man or woman, with attributes and char- 

 acteristics peculiar to itself. These pure types, as we have 

 seen, are mainly the thyroid, the pituitary, and the adrenal- 

 centered. 



Each with the signs peculiar to it can be identified among 

 the faces that pass one in the street. And they differ so mark- 

 edly among themselves that they provide a new and accurate 

 means of classifying varieties among the races of the species: 

 man. The thyroid type differs as much from the adrenal type as 

 does a greyhound from a bull-dog. The greyhound has a certain 

 size, form, character and capacity. The bull-dog has similar 

 qualities which are yet quite different. Each is built for a 

 particular career. Among human beings, the pure thyroid type 

 is easily distinguished from the pure adrenal type, and both of 

 these from the pure pituitary type. Each is stamped with a 

 significant figure, height, skin, hair, temperament, ambition, 

 social reactions and predisposition to certain diseases, 



The Mixed Types 



Among the mixed types, the lines of distinction are less clear, 

 and so they are more difficult to classify. The mixed types may 

 be said to be hyphenated. In them, two or even three of the in- 

 ternal secretory glands conflict for predominance. The combined 

 action makes for a resultant modification in the primary glandular 

 markings and effects, A hyphenated classification thus becomes 

 inevitable. Especially is this so if the two glands are mutually 

 antagonistic and inhibitory. A compromise effect is then neces- 

 sitated. Or an individual may be dominated by one gland at one 

 period of his life and by another at a later period. One of the 

 glands, the thyroid, for example, will show, by the traces it has 

 left upon the earliest developing features, that it was in control 

 at the very earliest dates of his history, while other signs will 

 disclose the more recent influence of the adrenal or of the pitui- 

 tary. The combination becomes classifiable as the thyroid- 

 pituitary type, or as the thyroid-adrenal type. 



That the external features as well as the chronic diseases of 

 human beings are controlled by some common factor has long 

 been suspected. Inquiries into morbid phenomena with a heredi- 

 tary trend yielded information that has paved the way for the 



