RAREFYING DISEASE OF THE SKELETON 419 



TABLE VI. OsTEOCYTE Counts: Number of Stellate (S), Retracting (R), 



Calcified (C), and Empty (E) Lacunae per High Field in Cortical 



Bone in Osteoporotic and Nonosteoporotic Autopsy Subjects 



served that the bones of white males were normally denser than 

 those of females; Negro females had denser bones than white; the 

 rate of decline with age was parallel in all sex and age groups. Smith 

 et al. (1960) made an x-ray survey of 218 ambulatory outpatient 

 cases with osteoporosis; almost all were Caucasians, a very few were 

 of Latin groups, and none were Negro, although the hospital was 

 geographically located in the area of a large Negro population. This 

 observation was reinforced further by the fact that the incidence 

 of spontaneous fracture of the hip, a common symptom of osteo- 

 porosis in patients over 70 years of age, was very much lower in 

 Negro than in white racial groups (Moldawer et al, 1961). Vincent 

 and Urist (1961) reported that osteoporosis occurred in a high 



