78 



Milton Landowne 



suggestive of disease had been excluded, we should have few 

 and insufficient old subjects. 



In some studies with few subjects, we have described 

 individual results, still hoping that we had selected the 



N- 91 



cardiac 

 neurol. 



skel. 



pulm. 



'normal 



ill" 





I8 0\ 



160 



140 



120 



I 00 — 



80 



60 



40 — 



20 — 



tv> 



ell ages 



2 



30 50 70 



years 



Fig. 3. Incidence of certain categories of diagnoses, expressed 

 as percentage of the total and agewise display, for 91 subjects of 

 a pulmonary function study. The incidence of acute or severe 

 chronic pulmonary disease was not recorded and is only suggested. 



"normal" or the "norm". These were detailed metabolic 

 balance studies such as ACTH studies (Duncan et al, 1952) or 

 calcium balance studies (Bogdonoff, Shock and Nichols, 1953). 



