THE ANIMAL, MAN (ANTHROPOLOGY) 



563 



Passing Muster 



The analysis of physical differences, by means of which individuals 

 can pass muster in order to be assigned to a particular race of man- 

 kind, is based upon certain generally accepted measurements. Lord 

 Kelvin, the physicist, once wrote : 



Landmarks for making anthropological measurements, o/, alare ; en, eurion ; 

 gh glabella; gn, gnathion ; na, nasion ; op, opisthocranium ; sn, subnasale; 

 zy, zygnion. (After Sullivan.) 



" I often say that when you can measure what you are speaking about, 

 and express it in numbers, you know something about it, but when you 

 cannot express it in numbers, your knowledge is of a meager and unsatis- 

 factory kind ; it may be the beginning of knowledge, but you have scarcely 

 in your thoughts advanced to the stage of science, whatever the matter 

 may be." 



The science of measuring man is called Anthro'pometry. Dr. 

 Louis R. Sullivan, formerly anthropologist at the American Museum 

 of Natural History in New York City, has prepared a compact 

 pocket manual, entitled Essentials of Anthropometry, designed 

 particularly to aid travelers and students generally, who may be 

 interested in the biological side of racial problems among the various 

 peoples with whom they come in contact. In this excellent little 

 manual Dr. Sullivan indicates six essential dimensions as a minimum, 

 namely, head breadth, face breadth, nasal width, head length, face 

 height, and nasal height, from which four critical ratios, or indices, 



