PROBLEMS OF MODERN SCIENCE 



recalling the traits of the Chinaman, so much so 

 that ' Mongolian ' is a term in common use to 

 describe the peculiar features of these cases. On 

 the other hand there is evidence to show that the 

 Chinaman may exhibit characteristics peculiar to 

 the European, owing to what may be termed for 

 the Chinaman a perversion of the secretion of his 

 ductless glands. 



Thus is growing the belief that the secret of 

 race-differentiation is hidden in the ductless glands, 

 that differences in external appearances and con- 

 formation of skeleton are dependent on indiscernible 

 differences in these glands and in the character of 

 the internal secretions they furnish. 



Holding this belief, one is driven to the con- 

 clusion that the ductless glands must influence the 

 ultimate conformation of the thigh-bone, must 

 determine the quality as well as the quantity of 

 its building. The shape of the future bone will 

 depend somewhat on the shape of the cartilaginous 

 model preceding it, but only to a limited extent. 

 The shape, ever changing during growth, must 

 be largely accounted for by the co-ordinated 

 activities of the bone-builders and the bone- 

 excavators. As the sculptor, gradually moulding 

 a mass of clay into some beautiful form, will often 

 add here and take away there to obtain the shape 

 desired, so the bone-builders, by adding here, 

 the excavators, by taking away there, are largely 

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