Show ENIGMA OF RACE IS PARTIALLY SOLVED scientist measures bones and discovers link washington D C knot tied in the threads of life as they stretch from generation to generation con statute a partial answer to the bio logical enigma of race such is the conclusion conc lulon of dr ales hrdlicka curator of physical anthropology of the smithsonian Smith soman institution from the study of many thousands of hu man and animal skeleton remains in the collection of the national mu eum e B measurements dr hrudicka Hr Hru blicka licka explains tend to arrange themselves in normal distribution curves the greater the number of specimens measured the smoother such a curve along such a curve races and all other groups shade im lm perceptibly into each other for ex ample if the length of the thigh bones of every human being on earth could be measured and the measurements plotted the greult would undoubtedly be very close to an absolutely smooth curve conclusive proof the same would result from plot ting the heights weights breadths of shoulders etc of every human being on earth strictly speaking these curves offer a conclusive proof that all human races and types be long to one and the same decies quite different is the result dr hrdlicka finds when one plots the form or shape of different parts of the body or even of the body as a whole of thousands of specimens one is no long erable to get a urn uni form distribution curve but a curve in which there are various nodes or points of aggregation these form the focal points of forms or types which differ substantially from each othel this newly discovered phenomenon of biological differentiation dr hrdlicka calls typo geny hither to the ever present normal distri aution curve has been a serious barrier to differentiation of human groups this barrier is now largely broken down this process of typo geny dr hrdlicka says I 1 as apparently of wide biological extension but is es specially ally obvious in man it is ob in probably all the more important and larger organs of the body and also in the body as a whole it is most obvious in the so called body constitution I 1 in physiognomy and in the nose hands and feet it manifests itself in the shapes of the skull of the palate of the lower jaw law the sternum the first rib the scapula the sacrum and the long bones there are indications that it extends also to the bram brain the main parts of the body the main internal organs and andl even to hu man functions 0 points to example As an example dr hrdlicka 11 points out the doss section of the main leg bones tibia of thousands of individuals of dif different terent raced show five different sha shapes P es which ate are quite clearly differentiated there are the prismatic the lateral prismatic the quadrilateral the pear shaped the gon lloid the fre quency of these shapes is found to differ diff er markedly for racial chocks each now constitutes node the causes of this phenomenon dr hrdlicka says seem to be mul tiple the different shapes are part ly survivals and partly individual functional modifications A tendency toward a frequency or rarity of the different forms in families local iced groups and races has already become hereditary and many of them are expressions of some gen erali zed tendencies in the body says dr hrdlicka pure types are rare and all the types connect by many intermediate forms or in ter gradations some of the types are already fairly represented at birth but in general their full devel is not realized until near or within adult life and they may un dergo some changes even later |