I'ress Association 



RECOGNIZING A PERSON BY HIS ODOR 



Here we make practical use of the fact that each individual differs from others chemi- 

 cally. We recognize persons by their appearance or by their voices or even by the 

 "style" of their art or workmanship, but it takes a dog to smell a particular indi- 

 vidual's "blood" 



fever. Other members of the same family are immune. Why is it that "one 

 man's meat is another man's poison"? In general, individuals appear to 

 differ chemically as well as physically. 



Organic Differences Two boys who appear to be equally well de- 



64 



