Show tue hifue TO BODILY DISORDERS scientist thus eipl explains a ins the striking differences between various races of mankind assuming that the various existing races ot of mankind are descended tron from a common stock how are arc to be es el ilaine ll 11 i such striking differences ns tlc alc these e that distinguish tor for example the Cl Anaman from the anglo saxon sason and the anglo saxon from the negro prof arthur keith recently discussed this question in an address before the anthropological section of the british association ne ile belie believes es that the key to tills this problem Is to be found through studying the disturbances lind and disorders that occasionally casio nally affect the development and growth ot of the human body especially those due to a functional derangement of one or more ot of the glands ot of internal secretion the pituitary thyroid pineal adrenal end and other glands in some manner not yet understood the functions carried on in their glands regulate not only the dimensions of the body but also the shape and size of each individual part the racial features of the mongolian type are imitated by growing europeans who are affected by deficiency disorders of the thyroid gland the features of the negro can best beet be accounted tor for by the nature of the growth regulating mechanism centered in the thyroid and suprarenal glands european features are connected with a dominance in the functions or fit the pituitary scientists hope that bat a thorough tho study of the still obscure subject of the so called ductless glands will provide the means of regulating to some extent the future evolution of the human race |